--- old/src/java.prefs/share/classes/module-info.java	2016-07-28 17:12:52.000000000 -0400
+++ new/src/java.prefs/share/classes/module-info.java	2016-07-28 17:12:52.000000000 -0400
@@ -23,6 +23,10 @@
  * questions.
  */
 
+/**
+ * Defines the Preferences API.
+ */
+
 module java.prefs {
     requires java.xml;