public DefaultComboBoxModel<String> buildVariableModel() {
		DefaultComboBoxModel<String> model = new DefaultComboBoxModel<String>();
		BufferedReader reader;
		
		try {
			reader = new BufferedReader(new FileReader(System.getProperty("resources") + "/database/variables"));
			
			String line;
			while((line = reader.readLine()) != null) {
				model.addElement(line);
			}
			
			reader.close();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		
		return model;
	}