--- old/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthInternalFrameUI.java	2015-04-01 22:34:24.748472388 -0700
+++ new/src/java.desktop/share/classes/javax/swing/plaf/synth/SynthInternalFrameUI.java	2015-04-01 22:34:24.548472384 -0700
@@ -56,6 +56,10 @@
         return new SynthInternalFrameUI((JInternalFrame)b);
     }
 
+    /**
+     * Constructs a {@code SynthInternalFrameUI}.
+     * @param b an internal frame
+     */
     protected SynthInternalFrameUI(JInternalFrame b) {
         super(b);
     }