/**
     * This Method delete all data currently exist in database table
     */
    public static void deleteDatabaseTable() {
    	String deleteT1 = "DELETE FROM `InvoiceProducts`;";
		String deleteT2 = "DELETE FROM `Invoices`;";
    	String deleteT3 = "DELETE FROM `Refreshments`;";
		String deleteT4 = "DELETE FROM `ParkingPasses`;";
    	String deleteT5 = "DELETE FROM `MovieTickets`;";
		String deleteT6 = "DELETE FROM `SeasonPasses`;";
    	String deleteT7 = "DELETE FROM `Products`;";
		String deleteT8 = "DELETE FROM `Customers`;";
    	String deleteT9 = "DELETE FROM `Emails`;";
		String deleteT10 = "DELETE FROM `Persons`;";
    	String deleteT11 = "DELETE FROM `Addresses`;";
		String deleteT12 = "DELETE FROM `StateCountries`;";
		String deleteT13 = "DELETE FROM `Countries`;";


		Connection conn = ConnectionFactory.getOne();
		PreparedStatement ps = null;

		try {
			// delete table- execute query
			ps = conn.prepareStatement(deleteT1);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT2);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT3);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT4);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT5);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT6);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT7);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT8);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT9);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT10);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT11);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT12);
			ps.executeUpdate();

			ps = conn.prepareStatement(deleteT13);
			ps.executeUpdate();

			ConnectionFactory.release(conn);
			ps.close();
		} catch (SQLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }