diff --git a/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java b/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
index eeee061..965367c 100644
--- a/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
+++ b/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
@@ -41,6 +41,18 @@
     public static final String INTERFACE_JAVA_DOC = " * Abstraction of an entity which represents the"
             + " functionality of ";
 
+
+    /**
+     * JavaDocs for event.
+     */
+    public static final String EVENT_JAVA_DOC = " * Represents event implementation of ";
+
+    /**
+     * JavaDocs for event listener.
+     */
+    public static final String EVENT_LISTENER_JAVA_DOC = " * Abstraction for event listener of ";
+
+
     /**
      * JavaDocs for builder interface class.
      */
@@ -97,6 +109,11 @@
     public static final String JAVA_DOC_SETTERS = " * Returns the builder object of ";
 
     /**
+     * JavaDocs's description for setter method.
+     */
+    public static final String JAVA_DOC_MANAGER_SETTERS = " * Sets the value to attribute ";
+
+    /**
      * JavaDocs's description for OF method.
      */
     public static final String JAVA_DOC_OF = " * Returns the object of ";
@@ -677,6 +694,17 @@
     public static final String BUILDER = "Builder";
 
     /**
+     * Static attribute for manager syntax.
+     */
+    public static final String MANAGER = "Manager";
+
+    /**
+     * Static attribute for service syntax.
+     */
+    public static final String SERVICE = "Service";
+
+
+    /**
      * Static attribute for interface syntax.
      */
     public static final String INTERFACE = "interface";
@@ -742,6 +770,16 @@
     public static final String SERVICE_METHOD_STRING = "Service";
 
     /**
+     * For event file generation.
+     */
+    public static final String EVENT_STRING = "Event";
+
+    /**
+     * For event listener file generation.
+     */
+    public static final String EVENT_LISTENER_STRING = "Listener";
+
+    /**
      * Static attribute for impl syntax.
      */
     public static final String IMPL = "Impl";
@@ -837,6 +875,11 @@
     public static final String ARRAY_LIST = "ArrayList";
 
     /**
+     * comment to be added for autogenerated impl methods.
+     */
+    public static final String YANG_UTILS_TODO = "//TODO: YANG utils generated code";
+
+    /**
      * Creates an instance of util constants.
      */
     private UtilConstants() {