diff --git a/.classpath b/.classpath
index 79174f7..5cca4e3 100644
--- a/.classpath
+++ b/.classpath
@@ -15,6 +15,7 @@
 	<classpathentry kind="con" path="org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER">
 		<attributes>
 			<attribute name="maven.pomderived" value="true"/>
+			<attribute name="org.eclipse.jst.component.nondependency" value=""/>
 		</attributes>
 	</classpathentry>
 	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7">
diff --git a/.project b/.project
index 2f9e9ae..ad63406 100644
--- a/.project
+++ b/.project
@@ -5,6 +5,11 @@
 	<projects>
 	</projects>
 	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.wst.common.project.facet.core.builder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 		<buildCommand>
 			<name>org.eclipse.jdt.core.javabuilder</name>
 			<arguments>
@@ -15,9 +20,17 @@
 			<arguments>
 			</arguments>
 		</buildCommand>
+		<buildCommand>
+			<name>org.eclipse.wst.validation.validationbuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
 	</buildSpec>
 	<natures>
+		<nature>org.eclipse.jem.workbench.JavaEMFNature</nature>
+		<nature>org.eclipse.wst.common.modulecore.ModuleCoreNature</nature>
 		<nature>org.eclipse.jdt.core.javanature</nature>
 		<nature>org.eclipse.m2e.core.maven2Nature</nature>
+		<nature>org.eclipse.wst.common.project.facet.core.nature</nature>
 	</natures>
 </projectDescription>
diff --git a/.settings/org.eclipse.jdt.core.prefs b/.settings/org.eclipse.jdt.core.prefs
index ec4300d..443e085 100644
--- a/.settings/org.eclipse.jdt.core.prefs
+++ b/.settings/org.eclipse.jdt.core.prefs
@@ -1,5 +1,8 @@
 eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
 org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
 org.eclipse.jdt.core.compiler.compliance=1.7
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
 org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
 org.eclipse.jdt.core.compiler.source=1.7
diff --git a/.settings/org.eclipse.wst.common.component b/.settings/org.eclipse.wst.common.component
new file mode 100644
index 0000000..1f0cece
--- /dev/null
+++ b/.settings/org.eclipse.wst.common.component
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?><project-modules id="moduleCoreId" project-version="1.5.0">
+    <wb-module deploy-name="social-networking-service-model">
+        <wb-resource deploy-path="/" source-path="/src/main/java"/>
+    </wb-module>
+</project-modules>
diff --git a/.settings/org.eclipse.wst.common.project.facet.core.xml b/.settings/org.eclipse.wst.common.project.facet.core.xml
new file mode 100644
index 0000000..1b22d70
--- /dev/null
+++ b/.settings/org.eclipse.wst.common.project.facet.core.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<faceted-project>
+  <installed facet="java" version="1.7"/>
+  <installed facet="jst.utility" version="1.0"/>
+</faceted-project>
diff --git a/src/main/java/org/gcube/portal/socialnetworking/model/input/MessageInputBean.java b/src/main/java/org/gcube/portal/socialnetworking/model/input/MessageInputBean.java
index 4d6864d..811059c 100644
--- a/src/main/java/org/gcube/portal/socialnetworking/model/input/MessageInputBean.java
+++ b/src/main/java/org/gcube/portal/socialnetworking/model/input/MessageInputBean.java
@@ -47,7 +47,7 @@ public class MessageInputBean implements Serializable {
 		super();
 	}
 
-	public MessageInputBean(String sender, String body, String subject,
+	public MessageInputBean(String body, String subject,
 			ArrayList<Recipient> recipients) {
 		super();
 		//this.sender = sender;