finalizing code

src/ChainQueue.java

@@ -104,11 +104,6 @@ public class ChainQueue<E> implements Queue<E> {
         return temp;
     }
 
-    @Override
-    public E element() {
-        return null;
-    }
-
     @Override
     public E peek() { // only "see" into the queue and do not remove anything
         if (!this.isEmpty()) {
@@ -119,6 +114,11 @@ public class ChainQueue<E> implements Queue<E> {
 
     /*** the following is not implemented because it's not needed here ***/
 
+    @Override
+    public E element() {
+        return null;
+    }
+
     @Override
     public Iterator<E> iterator() {
         return null;