protected void loginToDatabase() {
		Properties properties = new Properties();
		String url = "jdbc:postgresql://gegevensbanken.khleuven.be:51516/2TX32?sslfactory=org.postgresql.ssl.NonValidatingFactory";
		properties.setProperty("user", "r0372415");
		properties.setProperty("password", "TRUMPTRUMPTRUMPTRUMPTRUMPTRUMP");
		properties.setProperty("ssl", "true");
		properties.setProperty("sslfactory", "org.postgresql.ssl.NonValidatingFactory");

		try {
			Class.forName("org.postgresql.Driver");
		} catch (ClassNotFoundException e) {
			e.printStackTrace();
			return;
		}
		try {
		connection = DriverManager.getConnection(url, properties);
		} catch (SQLException e) {
			System.out.println("Connection failed");
			e.printStackTrace();
			return;
		}
	}

protected void closeConnection() {
		try {
			connection.close();
			statement.clearBatch();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}