diff --git a/src/com/java/algorithm/CSVReader.java b/src/com/java/algorithm/CSVReader.java
index d53447f..5fa4348 100644
--- a/src/com/java/algorithm/CSVReader.java
+++ b/src/com/java/algorithm/CSVReader.java
@@ -5,6 +5,12 @@
 import java.util.List;
 
 public class CSVReader {
+    /**
+     * 
+     * @param file
+     * @return
+     * @throws IOException
+     */
     public static List<String> readData(String file) throws IOException {
         List<String> data = new LinkedList<>();
         InputStream in;