Java.lang.NullPointerException ao injetar o @PersistenceUnit -RESOLVIDO

public class Dao {

	@PersistenceUnit(unitName="ControleFotoPU")
	protected EntityManagerFactory emf;
	protected EntityManager em;

	public Dao() {
	}
...........................
}

<?xml version='1.0' encoding='utf-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
"-//Hibernate/Hibernate Configuration DTD//EN"
"http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
<session-factory>
<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
<property name="hibernate.connection.url">jdbc:mysql://localhost/controlefoto</property>
<property name="hibernate.connection.username">root</property>
<property name="hibernate.connection.password">root</property>
<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
<property name="show_sql">true</property>
</session-factory>
</hibernate-configuration>

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0" xmlns="http://java.sun.com/xml/ns/persistence">
    <persistence-unit name="ControleFotoPU">
    <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
			<property name="hibernate.ejb.cfgfile" value="/META-INF/hibernate.cfg.xml" />
        </properties>
</persistence-unit>
</persistence>