#vulnerable code 
                                private static void tearDownTxManager() throws SQLException {
        TransactionFactory.getTransactionFactory().getTransactionContext().tearDownTxManager();
    } 
                            #location 2 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                private static void tearDownTxManager() throws SQLException {
        TransactionFactory.getTransactionProvider().getTransactionContext().tearDownTxManager();
    }