Whitebox issue fix

Change-Id: I856266e26d2686affb9271c460927ba3e0e07db2
diff --git a/src/main/java/org/onosproject/yangutils/utils/io/impl/FileSystemUtil.java b/src/main/java/org/onosproject/yangutils/utils/io/impl/FileSystemUtil.java
index 3765f71..ffc36f7 100644
--- a/src/main/java/org/onosproject/yangutils/utils/io/impl/FileSystemUtil.java
+++ b/src/main/java/org/onosproject/yangutils/utils/io/impl/FileSystemUtil.java
@@ -53,7 +53,6 @@
      * @return existence status of package
      */
     public static boolean doesPackageExist(String pkg) {
-
         File pkgDir = new File(getPackageDirPathFromJavaJPackage(pkg));
         File pkgWithFile = new File(pkgDir + SLASH + "package-info.java");
         if (pkgDir.exists() && pkgWithFile.isFile()) {
@@ -70,7 +69,6 @@
      * @throws IOException any IO exception
      */
     public static void createPackage(String pkg, String pkgInfo) throws IOException {
-
         if (!doesPackageExist(pkg)) {
             try {
                 File pack = createDirectories(pkg);
@@ -92,9 +90,7 @@
      * @throws IOException any IO errors
      */
     public static void appendFileContents(File toAppend, File srcFile) throws IOException {
-
         updateFileHandle(srcFile, NEW_LINE + readAppendFile(toAppend.toString(), FOUR_SPACE_INDENTATION), false);
-        return;
     }
 
     /**
@@ -106,7 +102,6 @@
      * @throws IOException when fails to convert to string
      */
     public static String readAppendFile(String toAppend, String spaces) throws IOException {
-
         FileReader fileReader = new FileReader(toAppend);
         BufferedReader bufferReader = new BufferedReader(fileReader);
         try {
@@ -114,8 +109,8 @@
             String line = bufferReader.readLine();
 
             while (line != null) {
-                if (line.equals(SPACE) | line.equals(EMPTY_STRING) | line.equals(EIGHT_SPACE_INDENTATION)
-                        | line.equals(MULTIPLE_NEW_LINE)) {
+                if (line.equals(SPACE) || line.equals(EMPTY_STRING) || line.equals(EIGHT_SPACE_INDENTATION)
+                        || line.equals(MULTIPLE_NEW_LINE)) {
                     stringBuilder.append(NEW_LINE);
                 } else if (line.equals(FOUR_SPACE_INDENTATION)) {
                     stringBuilder.append(EMPTY_STRING);
@@ -142,7 +137,6 @@
      * does not exist but cannot be created, or cannot be opened for any other reason
      */
     public static void updateFileHandle(File inputFile, String contentTobeAdded, boolean isClose) throws IOException {
-
         FileWriter fileWriter = new FileWriter(inputFile, true);
         PrintWriter outputPrintWriter = new PrintWriter(fileWriter, true);
         if (!isClose) {
diff --git a/src/main/java/org/onosproject/yangutils/utils/io/impl/JavaDocGen.java b/src/main/java/org/onosproject/yangutils/utils/io/impl/JavaDocGen.java
index 982cbc4..c76ecad 100644
--- a/src/main/java/org/onosproject/yangutils/utils/io/impl/JavaDocGen.java
+++ b/src/main/java/org/onosproject/yangutils/utils/io/impl/JavaDocGen.java
@@ -17,7 +17,6 @@
 package org.onosproject.yangutils.utils.io.impl;
 
 import org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax;
-import org.onosproject.yangutils.utils.UtilConstants;
 
 import static org.onosproject.yangutils.utils.UtilConstants.BUILDER;
 import static org.onosproject.yangutils.utils.UtilConstants.BUILDER_CLASS_JAVA_DOC;
@@ -62,7 +61,7 @@
     /**
      * JavaDocs types.
      */
-    public static enum JavaDocType {
+    public enum JavaDocType {
 
         /**
          * For class.
@@ -141,7 +140,7 @@
     public static String getJavaDoc(JavaDocType type, String name, boolean isList) {
 
         name = JavaIdentifierSyntax.getSmallCase(JavaIdentifierSyntax.getCamelCase(name, null));
-        String javaDoc = UtilConstants.EMPTY_STRING;
+        String javaDoc;
         if (type.equals(JavaDocType.IMPL_CLASS)) {
             javaDoc = generateForImplClass(name);
         } else if (type.equals(JavaDocType.BUILDER_CLASS)) {