Должны ли сессия и фабрика быть закрыты?

Я использую Hibernate 5.0.2.Final с подключением к источнику данных (на Tomcat 8.0.15) и начал спрашивать себя, нужно ли закрывать не только сеанс, но и SessionFactory?

Прямо сейчас это выглядит так:

public static List<HibernateList> getHibernateList() {
        Session session = null;
        final String hql = "SELECT H FROM myhibernate.MyHibernate";
        try {
            SessionFactory factory = HibernateUtil.getSessionFactory();
            session = factory.openSession();
            session.beginTransaction();

            Query query = session.createQuery(hql);

            return query.list();
        } catch (HibernateException hibex) {
            Logger.getLogger(Hibernatepicker.class.getName()).log(Level.INFO, null, hql);
            Logger.getLogger(Hibernatepicker.class.getName()).log(Level.SEVERE, null, hibex);
        } finally {
            try {
                if (session != null) {
                    session.close();
                }
            } catch (HibernateException hibex) {
            }//Nothing I could do...
        }
        return null;
    }

Некоторые подробности из hibernate.cfg.xml

<property name="hibernate.connection.datasource">java:comp/env/jdbc/sqlserv</property>        
<property name="current_session_context_class">thread</property> 
<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property> 
<property name="hbm2ddl.auto">auto</property> 
<property name="show_sql">false</property>       
<property name="hibernate.generate_statistics">true</property>  

И HibernateUtil:

public class HibernateUtil {
private static final SessionFactory sessionFactory;

static {
    try {
        Configuration cfg = new Configuration();
        sessionFactory = cfg.configure("hibernate.cfg.xml").buildSessionFactory();
    } catch (Throwable ex) {
        Logger.getLogger(HibernateUtil.class.getName()).log(Level.SEVERE, null, ex);
        throw new ExceptionInInitializerError(ex);
    }
}

public static SessionFactory getSessionFactory() {
    return sessionFactory;
}
}

Я не решил, нужно ли вызывать этот метод в блоке finally вместо того, чтобы просто закрывать сеанс:

public static void disconnect(Session session, SessionFactory factory) {
        try {
            if (session != null) {
                session.close();
            } else {
                Logger.getLogger(HibernateUtil.class.getName()).log(Level.INFO, null, "Session is Null");
        }

    } catch (HibernateException | NullPointerException hibex) {
        Logger.getLogger(HibernateUtil.class.getName()).log(Level.INFO, null, "Couldn't close session, but there's nothing we can do...");
        Logger.getLogger(HibernateUtil.class.getName()).log(Level.SEVERE, null, hibex);
    }
    try {
        if (factory != null) {
            factory.close();
        } else {
            Logger.getLogger(HibernateUtil.class.getName()).log(Level.INFO, null, "Factory is Null");
        }

    } catch (HibernateException | NullPointerException hibex) {
        Logger.getLogger(HibernateUtil.class.getName()).log(Level.INFO, null, "Couldn't close session, but there's nothing we can do...");
        Logger.getLogger(HibernateUtil.class.getName()).log(Level.SEVERE, null, hibex);
    }
}