diff -r 06e0b7759125 -r 929bafd0db6f jdk/src/java.desktop/share/classes/javax/swing/ButtonGroup.java
--- a/jdk/src/java.desktop/share/classes/javax/swing/ButtonGroup.java	Wed Apr 15 14:38:13 2015 +0400
+++ b/jdk/src/java.desktop/share/classes/javax/swing/ButtonGroup.java	Wed Apr 15 10:24:01 2015 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 2015, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -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>();
 
     /**