And in BinaryBlobType/StringClobType, add register at the 
end of nullSafeSet(...)
<code>
public void nullSafeSet(PreparedStatement st, 
                        Object value, int index)
        throws HibernateException, SQLException {

    if (value == null) {
        st.setClob(index, null);
        return;
    }

    if (isOraclePreparedStatement(st)) {
        // skip ...
        // open temperary clob and write....
        // skip ...
        temperaryClob.close();
        LobCleanUpInterceptor.registerTempLobs(temperaryClob);
    } else {
        st.setClob(index, 
               Hibernate.createClob((String) value));
    }
}
</code>

finally, obtain session with interceptor

   sessionFactory.openSession(new LobCleanUpInterceptor());

After flush() or commit(), nullSafeSet(...) will be called
and register temperary LOBs into a thread local set.
when flush() is complete. postFlush(...) will be invoked and
all registered temperary LOBs will be cleaned.

This interceptor may only work when applying 
thread-local-session pattern.

regards.