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/CaseListener.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/CaseListener.java
index b059c46..d91bf25 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/CaseListener.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/parser/impl/listeners/CaseListener.java
@@ -67,7 +67,7 @@
  */
 
 /**
- * Implements listener based call back function corresponding to the "case" rule
+ * Represents listener based call back function corresponding to the "case" rule
  * defined in ANTLR grammar file for corresponding ABNF rule in RFC 6020.
  */
 public final class CaseListener {