private void initBtn() {
    basePackageBtn.addActionListener(e -> {
        PackageChooser packageChooser = new PackageChooserDialog("Select Base Package", project);
        packageChooser.show();
        PsiPackage psiPackage = packageChooser.getSelectedPackage();
        if (Objects.nonNull(psiPackage)) {
            basePackageField.setText(psiPackage.getQualifiedName());
        }
    });

    outputPathBtn.addActionListener(e -> {
        FileChooserDescriptor descriptor = new FileChooserDescriptor(false, true, false, false, false, false);
        VirtualFile virtualFile = FileChooser.chooseFile(descriptor, project, null);
        if (Objects.nonNull(virtualFile)) {
            outputPathField.setText(virtualFile.getPath());
        }
    });
}