[ONOS-5142] [ONOS-5137] defect fixes

Change-Id: I2856a7a41b242b16c981915dd97986aa9c6ab676
diff --git a/plugin/src/main/java/org/onosproject/yangutils/translator/exception/InvalidNodeForTranslatorException.java b/plugin/src/main/java/org/onosproject/yangutils/translator/exception/InvalidNodeForTranslatorException.java
index 03b0382..c737175 100644
--- a/plugin/src/main/java/org/onosproject/yangutils/translator/exception/InvalidNodeForTranslatorException.java
+++ b/plugin/src/main/java/org/onosproject/yangutils/translator/exception/InvalidNodeForTranslatorException.java
@@ -22,10 +22,10 @@
 public class InvalidNodeForTranslatorException extends RuntimeException {
 
     private static final long serialVersionUID = 20160311L;
-    private String fileName;
+    private transient String fileName;
 
     /**
-     * Create a new exception.
+     * Creates a new exception.
      */
     public InvalidNodeForTranslatorException() {
         super();