diff --git a/src/main/java/us/monoid/json/CDL.java b/src/main/java/us/monoid/json/CDL.java
index 63d3518..15a7db3 100644
--- a/src/main/java/us/monoid/json/CDL.java
+++ b/src/main/java/us/monoid/json/CDL.java
@@ -44,6 +44,10 @@ of this software and associated documentation files (the "Software"), to deal
  * @version 2009-09-11
  */
 public class CDL {
+    
+    private CDL() {
+        
+    }
 
     /**
      * Get the next value. The value can be wrapped in quotes. The value can
diff --git a/src/main/java/us/monoid/json/Cookie.java b/src/main/java/us/monoid/json/Cookie.java
index 4301b0f..7d14686 100644
--- a/src/main/java/us/monoid/json/Cookie.java
+++ b/src/main/java/us/monoid/json/Cookie.java
@@ -32,6 +32,10 @@ of this software and associated documentation files (the "Software"), to deal
  * @version 2008-09-18
  */
 public class Cookie {
+    
+    private Cookie() {
+        
+    }
 
     /**
      * Produce a copy of a string in which the characters '+', '%', '=', ';'
diff --git a/src/main/java/us/monoid/json/CookieList.java b/src/main/java/us/monoid/json/CookieList.java
index 30e7666..74630db 100644
--- a/src/main/java/us/monoid/json/CookieList.java
+++ b/src/main/java/us/monoid/json/CookieList.java
@@ -32,6 +32,10 @@ of this software and associated documentation files (the "Software"), to deal
  * @version 2008-09-18
  */
 public class CookieList {
+    
+    private CookieList() {
+        
+    }
 
     /**
      * Convert a cookie list into a JSONObject. A cookie list is a sequence
diff --git a/src/main/java/us/monoid/json/HTTP.java b/src/main/java/us/monoid/json/HTTP.java
index f96deaa..9c5fc58 100644
--- a/src/main/java/us/monoid/json/HTTP.java
+++ b/src/main/java/us/monoid/json/HTTP.java
@@ -32,6 +32,10 @@ of this software and associated documentation files (the "Software"), to deal
  * @version 2008-09-18
  */
 public class HTTP {
+    
+    private HTTP() {
+        
+    }
 
     /** Carriage return/line feed. */
     public static final String CRLF = "\r\n";
diff --git a/src/main/java/us/monoid/json/JSONML.java b/src/main/java/us/monoid/json/JSONML.java
index e94cfb5..2211d5f 100644
--- a/src/main/java/us/monoid/json/JSONML.java
+++ b/src/main/java/us/monoid/json/JSONML.java
@@ -35,6 +35,10 @@ of this software and associated documentation files (the "Software"), to deal
  * @version 2010-02-12
  */
 public class JSONML {
+    
+    private JSONML() {
+        
+    }
 
 	/**
 	 * Parse XML values and store them in a JSONArray.
diff --git a/src/main/java/us/monoid/json/XML.java b/src/main/java/us/monoid/json/XML.java
index 291e9ca..64bb326 100644
--- a/src/main/java/us/monoid/json/XML.java
+++ b/src/main/java/us/monoid/json/XML.java
@@ -34,6 +34,10 @@ of this software and associated documentation files (the "Software"), to deal
  * @version 2010-04-08
  */
 public class XML {
+    
+    private XML() {
+        
+    }
 
     /** The Character '&'. */
     public static final Character AMP   = new Character('&');
diff --git a/src/main/java/us/monoid/web/ssl/TrustAllX509SocketFactory.java b/src/main/java/us/monoid/web/ssl/TrustAllX509SocketFactory.java
index 5f0dcea..77dcc62 100644
--- a/src/main/java/us/monoid/web/ssl/TrustAllX509SocketFactory.java
+++ b/src/main/java/us/monoid/web/ssl/TrustAllX509SocketFactory.java
@@ -5,6 +5,11 @@
 import javax.net.ssl.TrustManager;
 
 public class TrustAllX509SocketFactory {
+    
+    private TrustAllX509SocketFactory() {
+        
+    }
+    
     public static SSLSocketFactory getSSLSocketFactory() throws Exception {
         SSLContext sc = SSLContext.getInstance("SSL");
         sc.init(null, TrustAllX509Certificates.TRUST_MANAGER, null);