some javadoc comment

src/graph/LayeredGraphNode.java

@@ -24,9 +24,16 @@ public interface LayeredGraphNode {
    */
   public ElkNode getOriginalNode();
 
-
-  public void setMouseOver( boolean over );
+  /**
+   * setter for the field mouseOver
+   * @param mouseOver the new value
+   */
+  public void setMouseOver( boolean mouseOver );
   
+  /**
+   * getter for the field mouseOver
+   * @return current value of the field
+   */
   public boolean isMouseOver();
   
   /**