diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 5b60111..57e6834 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -17,12 +17,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Set up JDK
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
-          java-version: '21'
+          java-version: '25'
           distribution: 'liberica'
           cache: maven
 
@@ -30,7 +30,7 @@ jobs:
         run: mvn --batch-mode clean test
 
       - name: Test Coverage
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v7
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
diff --git a/.mvn/wrapper/maven-wrapper.properties b/.mvn/wrapper/maven-wrapper.properties
index d58dfb7..c0bcafe 100644
--- a/.mvn/wrapper/maven-wrapper.properties
+++ b/.mvn/wrapper/maven-wrapper.properties
@@ -1,19 +1,3 @@
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
-wrapperVersion=3.3.2
+wrapperVersion=3.3.4
 distributionType=only-script
-distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.9/apache-maven-3.9.9-bin.zip
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.11/apache-maven-3.9.11-bin.zip
diff --git a/README.md b/README.md
index 54349cb..c75986d 100644
--- a/README.md
+++ b/README.md
@@ -93,11 +93,12 @@ void parse() {
     // ... или reportPageFactory.create("1.xml");
     // ... или reportPageFactory.create("1.csv");
 
-    // Метод найдет ячейку с текстом "Таблица 1",
-    // воспринимает следующую за ней строку как заголовок таблицы (который описан через enum TableHeader).
-    // Из последующих строк (до пустой строки или конца файла) извлекаются данные
-    // (метод использует бин ExcelTableFactory для создания таблицы Table на основе ReportPage) 
-    Table table = reportPage.create("Таблица 1", TableHeader.class);
+    // Регистронезависимо найдет ячейку с текстом "Таблица 1" - это имя таблицы.
+    // Имя таблицы описано в единственной строке (2ой аргумент).
+    // Парсит следующую 1 строку (5ый аргумент) как заголовок таблицы (заголовок описан с помощью enum TableHeader).
+    // Последующие строки парсятся как данные до пустой строки или конца файла (3ий аргумент 'null')
+    // (метод использует бин ExcelTableFactory для создания таблицы Table на основе ReportPage).
+    Table table = reportPage.createTable("Таблица 1", 1, null, TableHeader.class, 1);
 
     // Итерируемся по строкам таблицы и извлекаем ячейки из строк по заголовку таблицы
     table.stream()
@@ -107,3 +108,24 @@ void parse() {
             });
 }
 ```
+
+### Чтение таблиц из файла с вашим форматом данных
+Автоконфигурация поставляет зависимости для чтения таблиц из excel, xml и csv файлов.
+Если у вас есть собственная реализация формата [Table Wrapper API](https://github.com/spacious-team/table-wrapper-api),
+прочтите таблицу следующим образом:
+```java
+// 1. Выполните регистрацию фабрики вашего формата данных
+CustomTableFactory factory = new CustomTableFactory();  // CustomTableFactory implements TableFactory
+TableFactoryRegistry.add(factory);
+
+// 2. Создайте объект вашего класса доступа к данным, например из файла (может быть любой источник, кроме файла)
+CustomReportPage reportPage = new CustomReportPage("My file.txt");  // CustomReportPage implements ReportPage
+
+// 3. Прочитайте таблицу из вашего файла тем же API, что и для excel, xml, csv файла
+Table table = reportPage.createTable("Таблица 1", 1, null, TableHeader.class, 1);
+table.stream()
+        .forEach(row -> {
+            String product = row.getStringCellValue(TableHeader.PRODUCT);
+            BigDecimal price = getBigDecimalCellValue(TableHeader.PRICE);
+        });
+```
diff --git a/checkerframework.astub b/checkerframework.astub
new file mode 100644
index 0000000..0b9b199
--- /dev/null
+++ b/checkerframework.astub
@@ -0,0 +1,40 @@
+/*
+ * Table Wrapper Spring Boot Starter
+ * Copyright (C) 2026  Spacious Team <spacious-team@ya.ru>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import org.checkerframework.checker.nullness.qual.EnsuresNonNull;
+import org.checkerframework.checker.nullness.qual.EnsuresNonNullIf;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import java.util.function.Supplier;
+
+package java.util;
+public class Objects {
+
+    @EnsuresNonNull("#1")
+    static <T> T requireNonNull(@Nullable T obj);
+
+    @EnsuresNonNull("#1")
+    static <T> T requireNonNull(@Nullable T obj, String message);
+
+    @EnsuresNonNull("#1")
+    static <T> T requireNonNull(@Nullable T obj, Supplier<String> messageSupplier);
+
+    @EnsuresNonNullIf(expression="#1", result=true)
+    static boolean nonNull(@Nullable Object obj);
+
+    @EnsuresNonNullIf(expression="#1", result=false)
+    static boolean isNull(@Nullable Object obj);
+}
diff --git a/codecov.yml b/codecov.yml
new file mode 100644
index 0000000..2a54778
--- /dev/null
+++ b/codecov.yml
@@ -0,0 +1,9 @@
+# https://docs.codecov.com/docs/codecov-yaml
+coverage:
+  status:
+    project:
+      default:
+        threshold: 5%  # allows to drop coverage (https://docs.codecov.com/docs/commit-status#project-status)
+    patch:
+      default:
+        target: 0%  # allows no tests in PR (https://docs.codecov.com/docs/commit-status#patch-status)
diff --git a/mvnw b/mvnw
index 19529dd..bd8896b 100644
--- a/mvnw
+++ b/mvnw
@@ -19,7 +19,7 @@
 # ----------------------------------------------------------------------------
 
 # ----------------------------------------------------------------------------
-# Apache Maven Wrapper startup batch script, version 3.3.2
+# Apache Maven Wrapper startup batch script, version 3.3.4
 #
 # Optional ENV vars
 # -----------------
@@ -105,14 +105,17 @@ trim() {
   printf "%s" "${1}" | tr -d '[:space:]'
 }
 
+scriptDir="$(dirname "$0")"
+scriptName="$(basename "$0")"
+
 # parse distributionUrl and optional distributionSha256Sum, requires .mvn/wrapper/maven-wrapper.properties
 while IFS="=" read -r key value; do
   case "${key-}" in
   distributionUrl) distributionUrl=$(trim "${value-}") ;;
   distributionSha256Sum) distributionSha256Sum=$(trim "${value-}") ;;
   esac
-done <"${0%/*}/.mvn/wrapper/maven-wrapper.properties"
-[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in ${0%/*}/.mvn/wrapper/maven-wrapper.properties"
+done <"$scriptDir/.mvn/wrapper/maven-wrapper.properties"
+[ -n "${distributionUrl-}" ] || die "cannot read distributionUrl property in $scriptDir/.mvn/wrapper/maven-wrapper.properties"
 
 case "${distributionUrl##*/}" in
 maven-mvnd-*bin.*)
@@ -130,7 +133,7 @@ maven-mvnd-*bin.*)
   distributionUrl="${distributionUrl%-bin.*}-$distributionPlatform.zip"
   ;;
 maven-mvnd-*) MVN_CMD=mvnd.sh _MVNW_REPO_PATTERN=/maven/mvnd/ ;;
-*) MVN_CMD="mvn${0##*/mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;;
+*) MVN_CMD="mvn${scriptName#mvnw}" _MVNW_REPO_PATTERN=/org/apache/maven/ ;;
 esac
 
 # apply MVNW_REPOURL and calculate MAVEN_HOME
@@ -227,7 +230,7 @@ if [ -n "${distributionSha256Sum-}" ]; then
     echo "Please disable validation by removing 'distributionSha256Sum' from your maven-wrapper.properties." >&2
     exit 1
   elif command -v sha256sum >/dev/null; then
-    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c >/dev/null 2>&1; then
+    if echo "$distributionSha256Sum  $TMP_DOWNLOAD_DIR/$distributionUrlName" | sha256sum -c - >/dev/null 2>&1; then
       distributionSha256Result=true
     fi
   elif command -v shasum >/dev/null; then
@@ -252,8 +255,41 @@ if command -v unzip >/dev/null; then
 else
   tar xzf${__MVNW_QUIET_TAR:+"$__MVNW_QUIET_TAR"} "$TMP_DOWNLOAD_DIR/$distributionUrlName" -C "$TMP_DOWNLOAD_DIR" || die "failed to untar"
 fi
-printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/mvnw.url"
-mv -- "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME"
+
+# Find the actual extracted directory name (handles snapshots where filename != directory name)
+actualDistributionDir=""
+
+# First try the expected directory name (for regular distributions)
+if [ -d "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" ]; then
+  if [ -f "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain/bin/$MVN_CMD" ]; then
+    actualDistributionDir="$distributionUrlNameMain"
+  fi
+fi
+
+# If not found, search for any directory with the Maven executable (for snapshots)
+if [ -z "$actualDistributionDir" ]; then
+  # enable globbing to iterate over items
+  set +f
+  for dir in "$TMP_DOWNLOAD_DIR"/*; do
+    if [ -d "$dir" ]; then
+      if [ -f "$dir/bin/$MVN_CMD" ]; then
+        actualDistributionDir="$(basename "$dir")"
+        break
+      fi
+    fi
+  done
+  set -f
+fi
+
+if [ -z "$actualDistributionDir" ]; then
+  verbose "Contents of $TMP_DOWNLOAD_DIR:"
+  verbose "$(ls -la "$TMP_DOWNLOAD_DIR")"
+  die "Could not find Maven distribution directory in extracted archive"
+fi
+
+verbose "Found extracted Maven distribution directory: $actualDistributionDir"
+printf %s\\n "$distributionUrl" >"$TMP_DOWNLOAD_DIR/$actualDistributionDir/mvnw.url"
+mv -- "$TMP_DOWNLOAD_DIR/$actualDistributionDir" "$MAVEN_HOME" || [ -d "$MAVEN_HOME" ] || die "fail to move MAVEN_HOME"
 
 clean || :
 exec_maven "$@"
diff --git a/mvnw.cmd b/mvnw.cmd
index 249bdf3..92450f9 100644
--- a/mvnw.cmd
+++ b/mvnw.cmd
@@ -19,7 +19,7 @@
 @REM ----------------------------------------------------------------------------
 
 @REM ----------------------------------------------------------------------------
-@REM Apache Maven Wrapper startup batch script, version 3.3.2
+@REM Apache Maven Wrapper startup batch script, version 3.3.4
 @REM
 @REM Optional ENV vars
 @REM   MVNW_REPOURL - repo url base for downloading maven distribution
@@ -40,7 +40,7 @@
 @SET __MVNW_ARG0_NAME__=
 @SET MVNW_USERNAME=
 @SET MVNW_PASSWORD=
-@IF NOT "%__MVNW_CMD__%"=="" (%__MVNW_CMD__% %*)
+@IF NOT "%__MVNW_CMD__%"=="" ("%__MVNW_CMD__%" %*)
 @echo Cannot start maven from wrapper >&2 && exit /b 1
 @GOTO :EOF
 : end batch / begin powershell #>
@@ -73,16 +73,30 @@ switch -wildcard -casesensitive ( $($distributionUrl -replace '^.*/','') ) {
 # apply MVNW_REPOURL and calculate MAVEN_HOME
 # maven home pattern: ~/.m2/wrapper/dists/{apache-maven-<version>,maven-mvnd-<version>-<platform>}/<hash>
 if ($env:MVNW_REPOURL) {
-  $MVNW_REPO_PATTERN = if ($USE_MVND) { "/org/apache/maven/" } else { "/maven/mvnd/" }
-  $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace '^.*'+$MVNW_REPO_PATTERN,'')"
+  $MVNW_REPO_PATTERN = if ($USE_MVND -eq $False) { "/org/apache/maven/" } else { "/maven/mvnd/" }
+  $distributionUrl = "$env:MVNW_REPOURL$MVNW_REPO_PATTERN$($distributionUrl -replace "^.*$MVNW_REPO_PATTERN",'')"
 }
 $distributionUrlName = $distributionUrl -replace '^.*/',''
 $distributionUrlNameMain = $distributionUrlName -replace '\.[^.]*$','' -replace '-bin$',''
-$MAVEN_HOME_PARENT = "$HOME/.m2/wrapper/dists/$distributionUrlNameMain"
+
+$MAVEN_M2_PATH = "$HOME/.m2"
 if ($env:MAVEN_USER_HOME) {
-  $MAVEN_HOME_PARENT = "$env:MAVEN_USER_HOME/wrapper/dists/$distributionUrlNameMain"
+  $MAVEN_M2_PATH = "$env:MAVEN_USER_HOME"
+}
+
+if (-not (Test-Path -Path $MAVEN_M2_PATH)) {
+    New-Item -Path $MAVEN_M2_PATH -ItemType Directory | Out-Null
+}
+
+$MAVEN_WRAPPER_DISTS = $null
+if ((Get-Item $MAVEN_M2_PATH).Target[0] -eq $null) {
+  $MAVEN_WRAPPER_DISTS = "$MAVEN_M2_PATH/wrapper/dists"
+} else {
+  $MAVEN_WRAPPER_DISTS = (Get-Item $MAVEN_M2_PATH).Target[0] + "/wrapper/dists"
 }
-$MAVEN_HOME_NAME = ([System.Security.Cryptography.MD5]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join ''
+
+$MAVEN_HOME_PARENT = "$MAVEN_WRAPPER_DISTS/$distributionUrlNameMain"
+$MAVEN_HOME_NAME = ([System.Security.Cryptography.SHA256]::Create().ComputeHash([byte[]][char[]]$distributionUrl) | ForEach-Object {$_.ToString("x2")}) -join ''
 $MAVEN_HOME = "$MAVEN_HOME_PARENT/$MAVEN_HOME_NAME"
 
 if (Test-Path -Path "$MAVEN_HOME" -PathType Container) {
@@ -134,7 +148,33 @@ if ($distributionSha256Sum) {
 
 # unzip and move
 Expand-Archive "$TMP_DOWNLOAD_DIR/$distributionUrlName" -DestinationPath "$TMP_DOWNLOAD_DIR" | Out-Null
-Rename-Item -Path "$TMP_DOWNLOAD_DIR/$distributionUrlNameMain" -NewName $MAVEN_HOME_NAME | Out-Null
+
+# Find the actual extracted directory name (handles snapshots where filename != directory name)
+$actualDistributionDir = ""
+
+# First try the expected directory name (for regular distributions)
+$expectedPath = Join-Path "$TMP_DOWNLOAD_DIR" "$distributionUrlNameMain"
+$expectedMvnPath = Join-Path "$expectedPath" "bin/$MVN_CMD"
+if ((Test-Path -Path $expectedPath -PathType Container) -and (Test-Path -Path $expectedMvnPath -PathType Leaf)) {
+  $actualDistributionDir = $distributionUrlNameMain
+}
+
+# If not found, search for any directory with the Maven executable (for snapshots)
+if (!$actualDistributionDir) {
+  Get-ChildItem -Path "$TMP_DOWNLOAD_DIR" -Directory | ForEach-Object {
+    $testPath = Join-Path $_.FullName "bin/$MVN_CMD"
+    if (Test-Path -Path $testPath -PathType Leaf) {
+      $actualDistributionDir = $_.Name
+    }
+  }
+}
+
+if (!$actualDistributionDir) {
+  Write-Error "Could not find Maven distribution directory in extracted archive"
+}
+
+Write-Verbose "Found extracted Maven distribution directory: $actualDistributionDir"
+Rename-Item -Path "$TMP_DOWNLOAD_DIR/$actualDistributionDir" -NewName $MAVEN_HOME_NAME | Out-Null
 try {
   Move-Item -Path "$TMP_DOWNLOAD_DIR/$MAVEN_HOME_NAME" -Destination $MAVEN_HOME_PARENT | Out-Null
 } catch {
diff --git a/pom.xml b/pom.xml
index d4a2572..1a59b80 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>org.spacious-team</groupId>
     <artifactId>table-wrapper-spring-boot-starter</artifactId>
-    <version>2025.2</version>
+    <version>2026.1</version>
     <packaging>jar</packaging>
 
     <name>Spring Boot Starter for Table Wrapper</name>
@@ -31,7 +31,8 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <spring-boot.version>2.7.18</spring-boot.version>
-        <lombok.version>1.18.38</lombok.version>
+        <lombok.version>1.18.46</lombok.version>
+        <checkerframework.version>3.55.1</checkerframework.version>  <!-- Checker Framework 4.0.0+ requires Java 17+ -->
     </properties>
 
     <repositories>
@@ -54,7 +55,7 @@
             <dependency>
                 <groupId>com.github.spacious-team</groupId>
                 <artifactId>table-wrapper-api</artifactId>
-                <version>2025.1</version>
+                <version>2026.1</version>
             </dependency>
         </dependencies>
     </dependencyManagement>
@@ -63,17 +64,17 @@
         <dependency>
             <groupId>com.github.spacious-team</groupId>
             <artifactId>table-wrapper-excel-impl</artifactId>
-            <version>2025.1</version>
+            <version>2026.1</version>
         </dependency>
         <dependency>
             <groupId>com.github.spacious-team</groupId>
             <artifactId>table-wrapper-xml-impl</artifactId>
-            <version>2023.1</version>
+            <version>2026.1</version>
         </dependency>
         <dependency>
             <groupId>com.github.spacious-team</groupId>
             <artifactId>table-wrapper-csv-impl</artifactId>
-            <version>2024.1</version>
+            <version>2026.1</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -93,16 +94,22 @@
             <scope>provided</scope>
             <optional>true</optional>
         </dependency>
+        <dependency>
+            <groupId>org.checkerframework</groupId>
+            <artifactId>checker-qual</artifactId>
+            <version>${checkerframework.version}</version>
+            <scope>provided</scope>  <!-- for static analysis tools only -->
+        </dependency>
         <dependency>
             <groupId>org.junit.jupiter</groupId>
             <artifactId>junit-jupiter</artifactId>
-            <version>5.12.2</version>
+            <version>5.14.4</version>  <!-- junit-jupite 5.x is required for Java 11 -->
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-junit-jupiter</artifactId>
-            <version>5.18.0</version>
+            <version>5.23.0</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -118,7 +125,7 @@
             <plugins>
                 <plugin>
                     <artifactId>maven-surefire-plugin</artifactId>
-                    <version>3.5.3</version> <!-- JUnit 5 requirement -->
+                    <version>3.5.6</version> <!-- JUnit 5 requirement -->
                 </plugin>
             </plugins>
         </pluginManagement>
@@ -126,12 +133,54 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.14.0</version>
+                <version>3.15.0</version>
+                <configuration>
+                    <fork>true</fork> <!-- Must fork or else JVM arguments are ignored. -->
+                    <showDeprecation>true</showDeprecation>
+                    <showWarnings>true</showWarnings>
+                    <annotationProcessorPaths>
+                        <path>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                            <version>${lombok.version}</version>
+                        </path>
+                        <path>
+                            <groupId>org.checkerframework</groupId>
+                            <artifactId>checker</artifactId>
+                            <version>${checkerframework.version}</version>
+                        </path>
+                    </annotationProcessorPaths>
+                    <annotationProcessors>
+                        <annotationProcessor>
+                            lombok.launch.AnnotationProcessorHider$AnnotationProcessor
+                        </annotationProcessor>
+                        <annotationProcessor>
+                            org.checkerframework.checker.nullness.NullnessChecker
+                        </annotationProcessor>
+                    </annotationProcessors>
+                    <compilerArgs combine.children="append">
+                        <!--arg>-Awarns</arg-->
+                        <arg>-AskipDefs=.*Test</arg>
+                        <!-- After updating to Checker Framework 4 replace with
+                        https://github.com/typetools/checker-framework/blob/master/checker/src/main/java/org/checkerframework/checker/nullness/permit-nullness-assertion-exception.astub -->
+                        <arg>-Astubs=${project.basedir}/checkerframework.astub</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.code=ALL-UNNAMED</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.main=ALL-UNNAMED</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.model=ALL-UNNAMED</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.parser=ALL-UNNAMED</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.processing=ALL-UNNAMED</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.tree=ALL-UNNAMED</arg>
+                        <arg>-J--add-exports=jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED</arg>
+                        <arg>-J--add-opens=jdk.compiler/com.sun.tools.javac.comp=ALL-UNNAMED</arg>
+                    </compilerArgs>
+                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.13</version>
+                <version>0.8.15</version>
                 <executions>
                     <execution>
                         <id>prepare-agent</id>
@@ -151,7 +200,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
-                <version>3.3.1</version>
+                <version>3.4.0</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
diff --git a/src/main/java/org/spacious_team/table_wrapper/autoconfigure/DefaultContextAwareReportPageFactory.java b/src/main/java/org/spacious_team/table_wrapper/autoconfigure/DefaultContextAwareReportPageFactory.java
index 12e7ecf..fe29230 100644
--- a/src/main/java/org/spacious_team/table_wrapper/autoconfigure/DefaultContextAwareReportPageFactory.java
+++ b/src/main/java/org/spacious_team/table_wrapper/autoconfigure/DefaultContextAwareReportPageFactory.java
@@ -20,6 +20,7 @@
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
+import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 import org.spacious_team.table_wrapper.api.ReportPage;
 import org.springframework.beans.factory.config.AutowireCapableBeanFactory;
 import org.springframework.beans.factory.config.BeanDefinition;
@@ -63,12 +64,19 @@ private BeanDefinitionRegistry getBeanDefinitionRegistry() {
 
     @Override
     public ReportPage create(Object... args) {
+        @MonotonicNonNull Exception last = null;
         for (Class<? extends ReportPage> clazz : registeredReportPageTypes) {
             try {
                 return context.getBean(clazz, args);
-            } catch (Exception ignore) {
+            } catch (Exception e) {
+                last = e;
             }
         }
-        throw new ReportPageInstantiationException("Can't create ReportPage with arguments: " + List.of(args));
+        String message = "Can't create ReportPage with arguments: " + List.of(args);
+        if (last == null) {
+            throw new ReportPageInstantiationException(message);
+        } else {
+            throw new ReportPageInstantiationException(message, last);
+        }
     }
 }
diff --git a/src/main/java/org/spacious_team/table_wrapper/autoconfigure/DefaultReportPageFactory.java b/src/main/java/org/spacious_team/table_wrapper/autoconfigure/DefaultReportPageFactory.java
index c9e7cf1..df110a0 100644
--- a/src/main/java/org/spacious_team/table_wrapper/autoconfigure/DefaultReportPageFactory.java
+++ b/src/main/java/org/spacious_team/table_wrapper/autoconfigure/DefaultReportPageFactory.java
@@ -25,14 +25,18 @@
 import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+import org.checkerframework.checker.nullness.qual.Nullable;
 import org.spacious_team.table_wrapper.api.ReportPage;
+import org.spacious_team.table_wrapper.api.TableCell;
 import org.spacious_team.table_wrapper.api.TableCellAddress;
 import org.spacious_team.table_wrapper.csv.CsvReportPage;
 import org.spacious_team.table_wrapper.excel.ExcelSheet;
 import org.spacious_team.table_wrapper.xml.XmlReportPage;
 import org.springframework.util.Assert;
 import org.xml.sax.InputSource;
+import org.xml.sax.SAXException;
 
+import javax.xml.parsers.ParserConfigurationException;
 import java.io.BufferedInputStream;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
@@ -41,7 +45,7 @@
 import java.nio.file.Path;
 
 import static java.nio.file.StandardOpenOption.READ;
-import static java.util.Objects.nonNull;
+import static java.util.Objects.requireNonNull;
 import static org.spacious_team.table_wrapper.autoconfigure.DefaultReportPageFactory.KnownFileExtension.XLS;
 import static org.spacious_team.table_wrapper.autoconfigure.DefaultReportPageFactory.KnownFileExtension.XLSX;
 
@@ -69,12 +73,12 @@ protected ReportPage doCreate(Path path, Object sheetId) {
             switch (extension) {
                 case XLS:
                 case XLSX:
-                    Assert.isTrue(nonNull(sheetId), "Excel file's sheet number or name expected");
+                    Assert.notNull(sheetId, "Excel file's sheet number or name expected");
                     is = openForRead(path);
                     Sheet sheet = getExcelSheet(is, sheetId, extension);
                     return new ExcelSheet(sheet);
                 case XML:
-                    Assert.isTrue(nonNull(sheetId), "Xml file's sheet number or name expected");
+                    Assert.notNull(sheetId, "Xml file's sheet number or name expected");
                     is = openForRead(path);
                     Worksheet worksheet = getXmlSheet(is, sheetId);
                     return new XmlReportPage(worksheet);
@@ -124,7 +128,8 @@ private static Workbook getExcelWorkbook(InputStream is, KnownFileExtension exte
         }
     }
 
-    private static Worksheet getXmlSheet(InputStream is, Object sheetId) throws Exception {
+    private static Worksheet getXmlSheet(InputStream is, Object sheetId)
+            throws ParserConfigurationException, IOException, SAXException {
         nl.fountain.xelem.excel.Workbook workbook = getXmlWorkbook(is);
         if (sheetId instanceof Integer) {
             Worksheet worksheet = workbook.getWorksheetAt((Integer) sheetId);
@@ -140,7 +145,8 @@ private static Worksheet getXmlSheet(InputStream is, Object sheetId) throws Exce
         throw new ReportPageInstantiationException("Unexpected Excel Sheet identifier type:" + sheetIdType);
     }
 
-    private static nl.fountain.xelem.excel.Workbook getXmlWorkbook(InputStream is) throws Exception {
+    private static nl.fountain.xelem.excel.Workbook getXmlWorkbook(InputStream is)
+            throws ParserConfigurationException, SAXException, IOException {
         ExcelReader reader = new ExcelReader();
         is = skipNewLines(is); // required by ExcelReader
         InputSource source = new InputSource(is);
@@ -169,7 +175,7 @@ public ReportPage create(InputStream is, String sheetName) {
         return doCreate(is, sheetName);
     }
 
-    public ReportPage doCreate(InputStream is, Object sheetId) {
+    protected ReportPage doCreate(InputStream is, Object sheetId) {
         try {
             ByteArrayInputStream bais = convertToByteArrayInputStream(is);
             // try Excel file
@@ -212,15 +218,15 @@ public static ByteArrayInputStream convertToByteArrayInputStream(InputStream inp
         }
     }
 
-    @SuppressWarnings("DataFlowIssue")
     private static boolean isEmptyCsvReportPage(CsvReportPage reportPage) {
         if (reportPage.getLastRowNum() == -1) {
             return true;
         }
         // has only one Cell with NULL value
+        @Nullable TableCell cell;
         return reportPage.getLastRowNum() == 0 &&
-                reportPage.getCell(TableCellAddress.of(0, 0)) != null &&
-                reportPage.getRow(0).getCell(0).getValue() == null &&
+                (cell = reportPage.getCell(TableCellAddress.of(0, 0))) != null &&
+                cell.getValue() == null &&
                 reportPage.getCell(TableCellAddress.of(0, 1)) == null &&
                 reportPage.getCell(TableCellAddress.of(1, 0)) == null;
     }
@@ -229,8 +235,8 @@ enum KnownFileExtension {
         XLS, XLSX, XML, CSV;
 
         static KnownFileExtension valueOf(Path path) {
-            String fileName = path.getFileName().toString();
-            String[] fileNameParts = fileName.split("\\.");
+            Path fileName = requireNonNull(path.getFileName(), () -> "No file name: " + path);
+            String[] fileNameParts = fileName.toString().split("\\.");
             String extension = fileNameParts[fileNameParts.length - 1];
             return valueOf(extension.toUpperCase());
         }
diff --git a/src/main/java/org/spacious_team/table_wrapper/autoconfigure/TableWrapperAutoConfiguration.java b/src/main/java/org/spacious_team/table_wrapper/autoconfigure/TableWrapperAutoConfiguration.java
index 17d6189..732c256 100644
--- a/src/main/java/org/spacious_team/table_wrapper/autoconfigure/TableWrapperAutoConfiguration.java
+++ b/src/main/java/org/spacious_team/table_wrapper/autoconfigure/TableWrapperAutoConfiguration.java
@@ -19,6 +19,7 @@
 package org.spacious_team.table_wrapper.autoconfigure;
 
 
+import lombok.NoArgsConstructor;
 import org.spacious_team.table_wrapper.api.TableFactoryRegistry;
 import org.spacious_team.table_wrapper.csv.CsvReportPage;
 import org.spacious_team.table_wrapper.csv.CsvTableFactory;
@@ -35,8 +36,11 @@
 
 import java.util.stream.Stream;
 
+import static lombok.AccessLevel.PRIVATE;
+
 @AutoConfiguration
 @SuppressWarnings("unused")
+@NoArgsConstructor(access = PRIVATE)
 @ConditionalOnClass(TableFactoryRegistry.class)
 public class TableWrapperAutoConfiguration {
 
diff --git a/src/main/java/org/spacious_team/table_wrapper/autoconfigure/package-info.java b/src/main/java/org/spacious_team/table_wrapper/autoconfigure/package-info.java
new file mode 100644
index 0000000..b5d3811
--- /dev/null
+++ b/src/main/java/org/spacious_team/table_wrapper/autoconfigure/package-info.java
@@ -0,0 +1,23 @@
+/*
+ * Table Wrapper API
+ * Copyright (C) 2022  Spacious Team <spacious-team@ya.ru>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+@DefaultQualifier(NonNull.class)
+package org.spacious_team.table_wrapper.autoconfigure;
+
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.framework.qual.DefaultQualifier;
diff --git a/src/test/java/org/spacious_team/table_wrapper/autoconfigure/DefaultContextAwareReportPageFactoryTest.java b/src/test/java/org/spacious_team/table_wrapper/autoconfigure/DefaultContextAwareReportPageFactoryTest.java
index 4a52d79..6867dbf 100644
--- a/src/test/java/org/spacious_team/table_wrapper/autoconfigure/DefaultContextAwareReportPageFactoryTest.java
+++ b/src/test/java/org/spacious_team/table_wrapper/autoconfigure/DefaultContextAwareReportPageFactoryTest.java
@@ -24,6 +24,7 @@
 import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
 import org.apache.poi.xssf.usermodel.XSSFWorkbook;
+import org.checkerframework.checker.nullness.qual.Nullable;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.BeforeAll;
 import org.junit.jupiter.api.Test;
@@ -45,7 +46,7 @@
 import static org.spacious_team.table_wrapper.autoconfigure.ReportPageFactoryTestFileCreator.*;
 
 @SpringBootTest(classes = TableWrapperAutoConfiguration.class)
-public class DefaultContextAwareReportPageFactoryTest {
+class DefaultContextAwareReportPageFactoryTest {
 
     @Autowired
     DefaultContextAwareReportPageFactory factory;
@@ -155,6 +156,20 @@ void create_unknownConstructorArgTypes_exception() {
         assertThrows(ReportPageInstantiationException.class, () -> factory.create("arg1", "arg2", "arg3"));
     }
 
+    @Test
+    void create_noRegisteredReportPageTypes_exception() throws IOException {
+        List<Class<? extends ReportPage>> registeredTypes = List.copyOf(factory.getRegisteredReportPageTypes());
+        try {
+            factory.getRegisteredReportPageTypes().clear();
+            createCsvFile("file1.any");
+            Object path1 = getPath("file1.any");
+
+            assertThrows(ReportPageInstantiationException.class, () -> factory.create(path1));
+        } finally {
+            factory.getRegisteredReportPageTypes().addAll(registeredTypes);
+        }
+    }
+
     @Test
     void registerBeanDefinition() {
         int registeredTypes = factory.getRegisteredReportPageTypes().size();
@@ -187,8 +202,7 @@ public TableCellAddress find(int startRow, int endRow,
         }
 
         @Override
-        @SuppressWarnings("ReturnOfNull")
-        public ReportPageRow getRow(int i) {
+        public @Nullable ReportPageRow getRow(int i) {
             return null;
         }
 
diff --git a/src/test/java/org/spacious_team/table_wrapper/autoconfigure/DefaultReportPageFactoryTest.java b/src/test/java/org/spacious_team/table_wrapper/autoconfigure/DefaultReportPageFactoryTest.java
index 1c84863..fe4d03a 100644
--- a/src/test/java/org/spacious_team/table_wrapper/autoconfigure/DefaultReportPageFactoryTest.java
+++ b/src/test/java/org/spacious_team/table_wrapper/autoconfigure/DefaultReportPageFactoryTest.java
@@ -34,7 +34,7 @@
 import static org.mockito.Mockito.*;
 import static org.spacious_team.table_wrapper.autoconfigure.ReportPageFactoryTestFileCreator.*;
 
-public class DefaultReportPageFactoryTest {
+class DefaultReportPageFactoryTest {
 
     DefaultReportPageFactory factory = new DefaultReportPageFactory();
 
@@ -54,7 +54,7 @@ void create_firstSheetByPath_ok(String fileName) {
         Path path = getPath(fileName);
         assertNotNull(factory.create(path));
         assertNotNull(factory.create(path, 0));
-        assertNotNull(factory.create(path, sheetName));
+        assertNotNull(factory.create(path, SHEET_NAME));
     }
 
     @ParameterizedTest
@@ -66,7 +66,7 @@ void create_firstSheetByInputStream_ok(String fileName) throws IOException {
         is.reset();
         assertNotNull(factory.create(is, 0));
         is.reset();
-        assertNotNull(factory.create(is, sheetName));
+        assertNotNull(factory.create(is, SHEET_NAME));
     }
 
     @ParameterizedTest
@@ -129,6 +129,12 @@ void create_namedSheetForCsvByInputStream_ok(String fileName) {
         assertNotNull(factory.create(is, "SheetB"));
     }
 
+    @Test
+    void create_emptyFile_exception() {
+        InputStream is = getInputStream("empty.txt");
+        assertThrows(ReportPageInstantiationException.class, () -> factory.create(is, "SheetB"));
+    }
+
     // Test unexpected type sheet id
 
     @ParameterizedTest
diff --git a/src/test/java/org/spacious_team/table_wrapper/autoconfigure/ReportPageFactoryTestFileCreator.java b/src/test/java/org/spacious_team/table_wrapper/autoconfigure/ReportPageFactoryTestFileCreator.java
index 9e5ce01..152c5c0 100644
--- a/src/test/java/org/spacious_team/table_wrapper/autoconfigure/ReportPageFactoryTestFileCreator.java
+++ b/src/test/java/org/spacious_team/table_wrapper/autoconfigure/ReportPageFactoryTestFileCreator.java
@@ -40,7 +40,7 @@
 
 class ReportPageFactoryTestFileCreator {
     static final Path root = Path.of("target", "test-classes", "test-data");
-    static final String sheetName = "SheetA";
+    static final String SHEET_NAME = "SheetA";
 
     @SneakyThrows
     static void creteFiles() {
@@ -48,6 +48,7 @@ static void creteFiles() {
         createBinFile("test.bin");
         createCsvFile("test.csv");
         createCsvFile("test.txt");
+        createEmptyFile("empty.txt");
         createXmlFile("test.xml");
         try (HSSFWorkbook workbook = new HSSFWorkbook()) {
             createExcelFile("test.xls", workbook);
@@ -91,12 +92,18 @@ static void createCsvFile(String fileName) throws IOException {
         Files.write(path, lines);
     }
 
+    static void createEmptyFile(@SuppressWarnings("SameParameterValue") String fileName) throws IOException {
+        List<String> lines = List.of("");
+        Path path = getPath(fileName);
+        Files.write(path, lines);
+    }
+
     static void createXmlFile(@SuppressWarnings("SameParameterValue") String fileName) throws XelemException {
         Workbook workbook = new XLWorkbook();
         Path path = getPath(fileName);
         workbook.setFileName(path.toString());
 
-        Worksheet worksheet = workbook.addSheet(sheetName);
+        Worksheet worksheet = workbook.addSheet(SHEET_NAME);
         Row row = worksheet.addRow();
         row.addCell();
         row.addCell().setData("Table 1");
@@ -120,7 +127,7 @@ static void createExcelFile(String fileName, org.apache.poi.ss.usermodel.Workboo
         Path path = getPath(fileName);
         try (FileOutputStream fos = new FileOutputStream(path.toFile())) {
 
-            Sheet sheet = workbook.createSheet(sheetName);
+            Sheet sheet = workbook.createSheet(SHEET_NAME);
             org.apache.poi.ss.usermodel.Row row = sheet.createRow(0);
             row.createCell(0).setCellValue("Table 1");
             row = sheet.createRow(1);