public class PasswordManager implements PasswordManagerInterface {
    public static void main(String[] args) {
        PasswordManager pm = new PasswordManager();
        pm.showMenu();
    }

    public PasswordManager() {
        System.out.println("Hello World");
    }

    @Override
    public void listVaults() {

    }

    @Override
    public void openVault() {

    }

    @Override
    public void showMenu() {

    }
}