Applied patch from jira issue - OFBIZ-7600 - Enforce noninstantiability to UtilPlist class. Thanks Rishi Solanki  for your contribution.

git-svn-id: https://svn.apache.org/repos/asf/ofbiz/trunk@1751304 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/framework/base/src/org/ofbiz/base/util/UtilPlist.java b/framework/base/src/org/ofbiz/base/util/UtilPlist.java
index 65b137e..1f087b3 100644
--- a/framework/base/src/org/ofbiz/base/util/UtilPlist.java
+++ b/framework/base/src/org/ofbiz/base/util/UtilPlist.java
@@ -36,12 +36,14 @@
  * File Utilities
  *
  */
-public class UtilPlist {
+public final class UtilPlist {
 
     public static final String module = UtilPlist.class.getName();
 
+    private UtilPlist() {}
+    
     /** simple 4 char indentation */
-    public static final String indentFourString = "    ";
+    private static final String indentFourString = "    ";
 
     public static void writePlistProperty(String name, Object value, int indentLevel, PrintWriter writer) {
         for (int i = 0; i < indentLevel; i++) writer.print(indentFourString);