#vulnerable code 
                                public static EntityManager createEntityManager() {
        init(false);
        return PersistUtilHelper.getEntityManager();
        // return entityManagerFactory.createEntityManager();
    } 
                            #location 3 
                            #vulnerability type THREAD_SAFETY_VIOLATION
#fixed code
                                public static EntityManager createEntityManager() {
        init(false);
        return PersistUtilHelper.getEntityManager();
    }