diff --git a/client/src/main/java/br/com/caelum/restfulie/Restfulie.java b/client/src/main/java/br/com/caelum/restfulie/Restfulie.java
index a828b2f..53af4be 100644
--- a/client/src/main/java/br/com/caelum/restfulie/Restfulie.java
+++ b/client/src/main/java/br/com/caelum/restfulie/Restfulie.java
@@ -32,6 +32,9 @@
  * @author guilherme silveira
  */
 public class Restfulie {
+    
+    private Restfulie() {}
+    
 	
 	/**
 	 * Given an retrieved resource, gives access to restfulie's transition api.
diff --git a/client/src/main/java/br/com/caelum/restfulie/feature/Features.java b/client/src/main/java/br/com/caelum/restfulie/feature/Features.java
index 3e609c5..f42c26b 100644
--- a/client/src/main/java/br/com/caelum/restfulie/feature/Features.java
+++ b/client/src/main/java/br/com/caelum/restfulie/feature/Features.java
@@ -5,6 +5,8 @@
  * @author jose donizetti
  */
 public class Features {
+    
+    private Features() {}
 	
 	public static ResponseFeature throwError() {
 		return new ThrowError();