* chooseExportFile asks the user to choose his export file path
* The choice is limited by the dynamic extension filter
*/
private void chooseExportFile() {
JFileChooser fileChooser = new JFileChooser(Application.settings.getLastPath());
CustomFileFilter filter = new CustomFileFilter();
filter.setDescription("*."+(String)exportLanguages.get(jComboBoxLanguage.getSelectedItem()));
filter.addExtension((String)exportLanguages.get(jComboBoxLanguage.getSelectedItem()));
fileChooser.setFileFilter(filter);
if(fileChooser.showSaveDialog(null) == JFileChooser.APPROVE_OPTION) {
String filePath = fileChooser.getSelectedFile().getAbsolutePath();
// Check on extension
if (!filePath.toLowerCase().endsWith("."+(String)exportLanguages.get(jComboBoxLanguage.getSelectedItem())))