diff --git a/src/Common/src/main/java/greenify/common/ErrorResponse.java b/src/Common/src/main/java/greenify/common/ErrorResponse.java
index 648fc99..4acb747 100644
--- a/src/Common/src/main/java/greenify/common/ErrorResponse.java
+++ b/src/Common/src/main/java/greenify/common/ErrorResponse.java
@@ -7,6 +7,8 @@ public class ErrorResponse {
         this.message = message;
     }
 
+    public ErrorResponse() { }
+
     public String getMessage() {
         return message;
     }
@@ -14,4 +16,4 @@ public class ErrorResponse {
     public void setMessage(String message) {
         this.message = message;
     }
-}
+}
\ No newline at end of file
diff --git a/src/Common/src/main/java/greenify/common/UserDTO.java b/src/Common/src/main/java/greenify/common/UserDTO.java
index a3f5ea1..8ff9e56 100644
--- a/src/Common/src/main/java/greenify/common/UserDTO.java
+++ b/src/Common/src/main/java/greenify/common/UserDTO.java
@@ -5,6 +5,7 @@ package greenify.common;
 // The motivation for its use is that communication between processes is usually done
 // resorting to remote interfaces (e.g., web services), where each call is an expensive operation.
 public class UserDTO {
+
     private Long id;
     private String name;
 
@@ -20,7 +21,15 @@ public class UserDTO {
         return name;
     }
 
+    public void setName(String name) {
+        this.name = name;
+    }
+
     public Long getId() {
         return id;
     }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
 }
\ No newline at end of file