public void execute() {
        String commandWithArgs;
        System.out.println("Enter some command: ");
        while (true) {
            try {
                commandWithArgs = br.readLine();

                String result = executeCommand(commandWithArgs);
                System.out.println(result);
                if ("exit".equals(result)) {
                    break;
                }

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }