Coding gudilines for class and methods javadocs fixed.

Change-Id: I0153e6391c9ec9eacaac65c3989834b6bf5c65bf
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/GroupingListener.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/GroupingListener.java
index 707dfeb..c81e554 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/GroupingListener.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/GroupingListener.java
@@ -53,7 +53,6 @@
 import static org.onosproject.yangutils.utils.YangConstructType.STATUS_DATA;
 import static org.onosproject.yangutils.utils.YangConstructType.TYPEDEF_DATA;
 
-
 /*
  * Reference: RFC6020 and YANG ANTLR Grammar
  *
@@ -77,7 +76,7 @@
  */
 
 /**
- * Implements listener based call back function corresponding to the "grouping"
+ * Represents listener based call back function corresponding to the "grouping"
  * rule defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020.
  */
 public final class GroupingListener {