diff --git a/Servidor JEE/src/main/java/edu/proygrado/ejb/LoginEJB.java b/Servidor JEE/src/main/java/edu/proygrado/ejb/LoginEJB.java
index 16e8ea92e7015fd9139d9f474ba24cac1eec289c..c556237b8bcc70f56331253e70499449ea22e02c 100644
--- a/Servidor JEE/src/main/java/edu/proygrado/ejb/LoginEJB.java	
+++ b/Servidor JEE/src/main/java/edu/proygrado/ejb/LoginEJB.java	
@@ -22,6 +22,7 @@ import javax.ejb.TransactionManagement;
 import javax.ejb.TransactionManagementType;
 import javax.inject.Inject;
 import javax.persistence.EntityManager;
+import javax.persistence.EntityTransaction;
 import javax.persistence.PersistenceContext;
 import javax.persistence.TypedQuery;
 import javax.servlet.ServletContext;
@@ -402,6 +403,8 @@ public class LoginEJB {
 	}
 
 	public String cargarDatosDePrueba() {
+		try {
+		userTransaction.begin();
 		Liceo varela = new Liceo("Colegio Varela");
 		em.persist(varela);
 
@@ -456,7 +459,10 @@ public class LoginEJB {
 		em.persist(mate);
 
 		segundoAnio.addAlumno(invitado);
-
+		userTransaction.commit();
+		} catch(Exception e) {
+			return "error";
+		}
 		return "ok";
 	}
 
diff --git a/Servidor JEE/src/main/java/edu/proygrado/servicios/login/LoginRS.java b/Servidor JEE/src/main/java/edu/proygrado/servicios/login/LoginRS.java
index 1a713b4e749b815e8b26914ec519e1d21099939e..5e66eed443540ddcda77b1ea5a5db817045578f3 100644
--- a/Servidor JEE/src/main/java/edu/proygrado/servicios/login/LoginRS.java	
+++ b/Servidor JEE/src/main/java/edu/proygrado/servicios/login/LoginRS.java	
@@ -34,7 +34,7 @@ public class LoginRS{
     
     @GET
     @Path("/datosDePrueba")
-    public String cargarDatosDePrueba(){
+    public String cargarDatosDePrueba() {
     	return loginEJB.cargarDatosDePrueba();
     }
     
diff --git a/Servidor JEE/src/main/resources/META-INF/persistence.xml b/Servidor JEE/src/main/resources/META-INF/persistence.xml
index a4db38c81d6b7c31f5a40d8452e0e8728689db67..a6fef8a08bb86eec95d0b6f834ab5abebbde8a76 100644
--- a/Servidor JEE/src/main/resources/META-INF/persistence.xml	
+++ b/Servidor JEE/src/main/resources/META-INF/persistence.xml	
@@ -32,12 +32,13 @@
 	<class>edu.proygrado.modelo.Evaluacion</class>
 	<class>edu.proygrado.modelo.Grupo</class>
 	<class>edu.proygrado.modelo.GrupoPK</class>
-	<class>edu.proygrado.modelo.Liceo</class>
+	<class>edu.proygrado.modelo.Licseo</class>
 	<class>edu.proygrado.modelo.LiceoPK</class>
 	<class>edu.proygrado.modelo.Usuario</class>
 	<class>edu.proygrado.modelo.Sesion</class>
 	<properties>
 	<property name="javax.persistence.schema-generation.database.action" value="none" />
+	<property name="hibernate.hbm2ddl.auto" value="update"/>
 	</properties>
 	</persistence-unit>