public void executePreparedStatement(String query){
		prepareConnection();
		try {
			connection.setAutoCommit(false);
			java.sql.PreparedStatement prepStatement = prepareStatement(query);
			prepStatement.executeUpdate();
			prepStatement.close();
			connection.commit();
		} catch (SQLException e) {
			rollback(connection, "Error");
		}
		closeConnection();
	}