Adding missing javadoc per checkstyle and Duncan Jones at LANG-840

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1532228 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/lang3/time/FastDateParser.java

@@ -171,7 +171,11 @@ public Locale getLocale() {
         return locale;
     }
 
-    // Give access to generated pattern for test code
+    /**
+     * Returns the generated pattern (for testing purposes).
+     * 
+     * @return the generated pattern
+     */
     Pattern getParsePattern() {
         return parsePattern;
     }