--- old/src/java.desktop/share/classes/javax/swing/ButtonGroup.java	2015-04-07 14:28:06.994926531 -0700
+++ new/src/java.desktop/share/classes/javax/swing/ButtonGroup.java	2015-04-07 14:28:06.838926528 -0700
@@ -69,7 +69,9 @@
 @SuppressWarnings("serial")
 public class ButtonGroup implements Serializable {
 
-    // the list of buttons participating in this group
+    /**
+     * The list of buttons participating in this group.
+     */
     protected Vector<AbstractButton> buttons = new Vector<AbstractButton>();
 
     /**