<persistence-unit name="myPU" transaction-type="RESOURCE_LOCAL">
        <provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>
        <class>pack.EmailAddress</class>
        <class>pack.Message</class>
           <properties>
                <property name="javax.persistence.jdbc.user" value="root" />
                <property name="javax.persistence.jdbc.password" value="root" />
                <property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/kepsDb" />
                <property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
            </properties>

        </persistence-unit>

<property name="hibernate.hbm2ddl.auto" value="validate"/>