[ONOS-3902, ONOS-3903, ONOS-3904] string type, integer type derrived type

Change-Id: I8279e93fcb7dfb82491cc09057c9d75165add68d
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 cc4fa9d..f7e3556 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
@@ -62,7 +62,8 @@
     public static void createPackage(String pkg, String pkgInfo) throws IOException {
         if (!doesPackageExist(new File(pkg))) {
             try {
-                File pack = YangIoUtils.createDirectories(pkg.replace(UtilConstants.PERIOD, UtilConstants.SLASH));
+                File pack = YangIoUtils
+                        .createDirectories(pkg.replace(UtilConstants.PERIOD, UtilConstants.SLASH));
                 YangIoUtils.addPackageInfo(pack, pkgInfo, pkg);
             } catch (IOException e) {
                 throw new IOException("failed to create package-info file");