added maven embedded deployment with mvn tomee:run

src/main/java/com/commafeed/backend/dao/GenericDAO.java

@@ -1,5 +1,6 @@
 package com.commafeed.backend.dao;
 
+import java.io.Serializable;
 import java.util.List;
 
 import javax.annotation.PostConstruct;
@@ -13,9 +14,8 @@ import com.google.common.reflect.TypeToken;
 import com.uaihebert.factory.EasyCriteriaFactory;
 import com.uaihebert.model.EasyCriteria;
 
-
 @SuppressWarnings("serial")
-public abstract class GenericDAO<T, K> {
+public abstract class GenericDAO<T, K> implements Serializable {
 
 	private TypeToken<T> type = new TypeToken<T>(getClass()) {
 	};

src/main/java/com/commafeed/backend/dao/UserService.java

@@ -2,6 +2,7 @@ package com.commafeed.backend.dao;
 
 import java.util.List;
 
+import javax.ejb.Stateless;
 import javax.inject.Inject;
 
 import com.commafeed.backend.security.PasswordEncryptionService;
@@ -9,6 +10,7 @@ import com.commafeed.frontend.utils.ModelFactory.MF;
 import com.commafeed.model.User;
 import com.google.common.collect.Iterables;
 
+@Stateless
 public class UserService extends GenericDAO<User, Long> {
 
 	@Inject

src/main/resources/META-INF/persistence.xml

@@ -7,6 +7,7 @@
 	<persistence-unit name="primary">
 		<jta-data-source>${jpa.datasource.name}</jta-data-source>
 		<properties>
+		    <property name="openjpa.jdbc.SynchronizeMappings" value="buildSchema(ForeignKeys=true)"/>
 			<property name="hibernate.hbm2ddl.auto" value="update" />
 			<property name="hibernate.show_sql" value="false" />
 			<property name="toplink.ddl-generation" value="drop-and-create-tables"/>