Coding gudilines for class and methods javadocs fixed.

Change-Id: I0153e6391c9ec9eacaac65c3989834b6bf5c65bf
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/datamodel/YangNodeIdentifier.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/datamodel/YangNodeIdentifier.java
index e5d56fc..871b683 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/datamodel/YangNodeIdentifier.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/datamodel/YangNodeIdentifier.java
@@ -17,7 +17,7 @@
 package org.onosproject.yangutils.datamodel;
 
 /**
- * YANG node identifier which is a combination of prefix and name.
+ * Represents YANG node identifier which is a combination of prefix and name.
  */
 public class YangNodeIdentifier {
 
@@ -43,7 +43,7 @@
     }
 
     /**
-     * Set name of the node identifier.
+     * Sets name of the node identifier.
      *
      * @param name name of the node identifier
      */
@@ -61,7 +61,7 @@
     }
 
     /**
-     * Set prefix of the node identifier.
+     * Sets prefix of the node identifier.
      *
      * @param prefix prefix of the node identifier
      */