public static List<String> getComboData() {
        List<String> comboData = new ArrayList<>();
        try (DataInputStream dis = new DataInputStream(new FileInputStream(FILE_NAME))) {
            while(dis.available() > 0) {
                comboData.add(dis.readUTF());
            }
        } catch (FileNotFoundException ex) {
            Logger.getLogger(ComboElemPersistence.class.getName()).log(Level.SEVERE, "File Not Found.", ex);
            return comboData;
        } catch (IOException ex) {
            Logger.getLogger(ComboElemPersistence.class.getName()).log(Level.SEVERE, "IO Error.", ex);
        }
        return comboData;
    }