public void addCSV(String absolutePath, int readMode) {
		
		String s = "";
		
		RosterDB newDB = readCSV (absolutePath);
		for (Roster r: newDB.getRosters()) {
			if (rosterExists (r) && (readMode == READ_MODE_ADD)) {
				s += "Ignoriere doppelten Fahrtenleiter " + r.getGivenName() + " " + r.getFamilyName() + "\n";
			}
			else {
				add (r.getFamilyName(), r.getGivenName(), r.getPhoneNumber(), r.getIsAspirant());
				s += "Neuer Fahrtenleiter " + r.getGivenName() + " " + r.getFamilyName() + "\n";
			}
		}
		setIsDataChanged (true);
		
  		JOptionPane.showMessageDialog(null,
				s, "Fahrtenleiter importiert",
				JOptionPane.OK_OPTION);

	}