Minor changes for Json Serializer

Change-Id: I6adfb850c3f043c5463943931bf68dab480e6701
diff --git a/serializers/json/pom.xml b/serializers/json/pom.xml
index b8ce21e..830ecc2 100644
--- a/serializers/json/pom.xml
+++ b/serializers/json/pom.xml
@@ -81,10 +81,24 @@
                 </executions>
             </plugin>
             <plugin>
-                <groupId>org.apache.felix</groupId>
-                <artifactId>maven-bundle-plugin</artifactId>
-                <version>3.2.0</version>
-                <extensions>true</extensions>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-antrun-plugin</artifactId>
+                <version>1.8</version>
+                <executions>
+                    <execution>
+                        <phase>prepare-package</phase>
+                        <goals>
+                            <goal>run</goal>
+                        </goals>
+                        <configuration>
+                            <target>
+                                <delete>
+                                    <fileset dir="${project.build.outputDirectory}/org/onosproject/yang/gen" includes="**/*"/>
+                                </delete>
+                            </target>
+                        </configuration>
+                    </execution>
+                </executions>
             </plugin>
         </plugins>
     </build>
diff --git a/serializers/json/src/main/java/org/onosproject/yang/serializers/json/DataNodeJsonVisitor.java b/serializers/json/src/main/java/org/onosproject/yang/serializers/json/DataNodeJsonVisitor.java
index ecc3177..cc0e2ee 100644
--- a/serializers/json/src/main/java/org/onosproject/yang/serializers/json/DataNodeJsonVisitor.java
+++ b/serializers/json/src/main/java/org/onosproject/yang/serializers/json/DataNodeJsonVisitor.java
@@ -34,7 +34,7 @@
     private JsonBuilder jsonBuilder;
 
     /**
-     * Constructor.
+     * Creates an instance of data node JSON visitor.
      */
     public DataNodeJsonVisitor(JsonBuilder jb) {
         jsonBuilder = jb;
diff --git a/serializers/json/src/main/java/org/onosproject/yang/serializers/json/DefaultJsonWalker.java b/serializers/json/src/main/java/org/onosproject/yang/serializers/json/DefaultJsonWalker.java
index 6110cb7..3c2c4b4 100644
--- a/serializers/json/src/main/java/org/onosproject/yang/serializers/json/DefaultJsonWalker.java
+++ b/serializers/json/src/main/java/org/onosproject/yang/serializers/json/DefaultJsonWalker.java
@@ -40,7 +40,7 @@
     private DataNode.Builder dataNodeBuilder;
 
     /**
-     * Constructor.
+     * Creates an instance of JSON object node walker.
      */
     public DefaultJsonWalker(DataNode.Builder db) {
         dataNodeBuilder = db;
@@ -124,10 +124,8 @@
         String nodeName = getLatterSegment(fieldName, COLON);
         String namespace = getPreSegment(fieldName, COLON);
         dataNodeBuilder = SerializerHelper.addDataNode(dataNodeBuilder,
-                                                       nodeName,
-                                                       namespace,
-                                                       value,
-                                                       nodeType);
+                                                       nodeName, namespace,
+                                                       value, nodeType);
     }
 
     private void addNoneLeafDataNode(String fieldName, DataNode.Type nodeType) {