public boolean connect() {
		if (!connected) {
			try {
				connection = DriverManager.getConnection(
						Information.URL_DATABASE, Information.USER,
						Information.PASSWORD);
				connection.setAutoCommit(false);
				connected = true;

				System.out.println("Connected to " + Information.URL_DATABASE);
			} catch (Exception e) {
				System.err.println("Error when trying to connect "
						+ Information.URL_DATABASE);
				connected = false;
			}
		}
		return connected;
	}