Added java doc for deprecated decoration

src/main/java/org/json/CDL.java

@@ -23,12 +23,13 @@ Public Domain.
  * @author JSON.org
  * @version 2016-05-01
  */
-@Deprecated
 public class CDL {
 
     /**
      * Constructs a new CDL object.
+     * @deprecated (Utility class cannot be instantiated)
      */
+    @Deprecated
     public CDL() {
     }
 

src/main/java/org/json/Cookie.java

@@ -13,12 +13,13 @@ Public Domain.
  * @author JSON.org
  * @version 2015-12-09
  */
-@Deprecated
 public class Cookie {
 
     /**
      * Constructs a new Cookie object.
+     * @deprecated (Utility class cannot be instantiated)
      */
+    @Deprecated()
     private Cookie() {
     }
 

src/main/java/org/json/CookieList.java

@@ -13,6 +13,7 @@ public class CookieList {
 
     /**
      * Constructs a new CookieList object.
+     * @deprecated (Utility class cannot be instantiated)
      */
     @Deprecated
     public CookieList() {

src/main/java/org/json/JSONML.java

@@ -16,6 +16,7 @@ public class JSONML {
 
     /**
      * Constructs a new JSONML object.
+     * @deprecated (Utility class cannot be instantiated)
      */
     @Deprecated
     public JSONML() {