add override anno

src/edu/nps/moves/dis7/examples/ClassNameComparator.java

@@ -28,6 +28,7 @@ public class ClassNameComparator implements Comparator<Pdu> {
      * @param object1
      * @param object2
      */
+    @Override
     public int compare(Pdu object1, Pdu object2) {
         return object1.getClass().getName().compareTo(object2.getClass().getName());
     }