Coding gudilines for class and methods javadocs fixed.

Change-Id: I0153e6391c9ec9eacaac65c3989834b6bf5c65bf
diff --git a/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java b/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
index 8b0cfc7..6a994c9 100644
--- a/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
+++ b/utils/yangutils/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
@@ -21,12 +21,12 @@
 import java.util.List;
 
 /**
- * Provides utility constants while generating java files.
+ * Represents utilities constants which are used while generating java files.
  */
 public final class UtilConstants {
 
     /**
-     * Default constructor.
+     * Creates an instance of util constants.
      */
     private UtilConstants() {
     }