diff --git a/sdm/src/java/iterator/ITicketIterator.java b/sdm/src/java/iterator/ITicketIterator.java
index af2fafa..3a88f62 100644
--- a/sdm/src/java/iterator/ITicketIterator.java
+++ b/sdm/src/java/iterator/ITicketIterator.java
@@ -2,7 +2,7 @@
 
 import java.util.Iterator;
 
-public interface ITicketIterator extends Iterator<Integer>
+public interface ITicketIterator extends Iterator<Integer> // Is this interface really necessary? In any case you could keep it though!
 {
     boolean hasNext();
 
diff --git a/sdm/src/java/singleton/LazySingleton.java b/sdm/src/java/singleton/LazySingleton.java
index b50cf18..8815cb9 100644
--- a/sdm/src/java/singleton/LazySingleton.java
+++ b/sdm/src/java/singleton/LazySingleton.java
@@ -2,8 +2,8 @@
 
 import java.util.Random;
 
-public class LazySingleton {
-    int behaviour;
+public class LazySingleton { // Lazy and broken!
+    int behaviour; // Visibility
     private static LazySingleton new_singleton = null;
     private LazySingleton()
     {