session sess = null;
Transaction tx = null;

//some hibernate concern code 1
try{
    sess = HibernateUtil.openSession();
    tx = sess.beginTransaction();
    ....
}
catch(HibernateException e){
    if( tx != null) tx.rollback();
    session.close();
    return;
}

// some plain java code 1 - business logic - long line
....
....

//some hibernate concern code 2
try{
    sess.createQry..
    ....
    sess.update..
}
catch(HibernateException e){
    if( tx != null) tx.rollback();
    session.close();
    return;
}

// some plain java code 2 - business logic - long line
....
....


//some hibernate concern code 3
try{
    sess.createQry..
    ....
    sess.update..
    sess.save..
}
catch(HibernateException e){
    if( tx != null) tx.rollback();
    session.close();
    return;
}

// some plain java code 3 - business logic - long line
....
....
....
//some hibernate concern code n
try{
    sess.createQry..
    ....
    sess.update..
    sess.save..
    tx.commit();
}
catch(HibernateException e){
    if( tx != null) tx.rollback();
}
finally{
    session.close();
}

session sess = null;
Transaction tx = null;

try{
    sess = HibernateUtil.openSession();
    tx = sess.beginTransaction();
   
    //some plain java code 1
    // it might be long and have other try catch clause
    ....
    ....
    sess.update..
    .....
    //some plain java code 1
    // it might be long and have other try catch clause
    ....
    ....
    sess.save..
    .....
    //some plain java code 2
    // it might be long and have other try catch clause
    ....
    ....
    sess.delete..
    .....
    //some plain java code n
    // it might be long and have other try catch clause
    ....
    ....
    sess.update..
    .....
catch(HibernateException e){
    if( tx != null) tx.rollback();
}
finally{
    session.close();
}