I wonder what happens to the next code execution.

package jpastart.reserve.application;
import java.util.Optional;
import javax.persistence.EntityManager;
import jpastart.jpa.EMF;
import jpastart.reserve.model.User;

public class UserService {

    public UserService() {
        // // TODO Auto-generated constructor stub
    }

    public Optional<User> getUser(String email){
        EntityManager em = EMF.createEntityManager();
            try{
                    return Optional.ofNullable(em.find(User.class, email));
              }finally{
                    em.close();
            }


    }

}