New method for getting a File

[SirMoM]

final FileChooser fileChooser = new FileChooser();
			fileChooser.setTitle(new LangResourceManager().getLocaleString(LangResourceKeys.fileChooserCaption));
			fileChooser.getExtensionFilters().add(new ExtensionFilter(new LangResourceManager().getLocaleString(LangResourceKeys.csv_file), "*.csv"));

			try {
				fileChooser.setInitialDirectory(new File(PropertyManager.getProperty(PropertyFields.LAST_OPEND).toString()).getParentFile());
			} catch (final NullPointerException nullPointerException) {
				fileChooser.setInitialDirectory(new File(System.getProperty("user.home")));
			}

			// if the chooser is "x'ed" the file is null
			final File selectedFile = fileChooser.showOpenDialog(MainController.this.getStage().getScene().getWindow());
			if (selectedFile == null) {
				return;
			}

this is always the same so just put it in method in MC