return new UpgradeParser();
    }

    @Override
    protected ParserRequest.Builder createParserRequestBuilder(String[] args) {
        return ParserRequest.mvnup(args, createMessageBuilderFactory());
    }

            return 1;
        } finally {
            if (classWorldManaged) {
                classWorld.close();
            }
        }
    }

    protected MessageBuilderFactory createMessageBuilderFactory() {
        return new JLineMessageBuilderFactory();
    }

    protected abstract Invoker createInvoker();

    protected abstract Parser createParser();

    protected Parser createParser() {
        return new MavenParser();
    }

    @Override
    protected ParserRequest.Builder createParserRequestBuilder(String[] args) {
        return ParserRequest.mvn(args, createMessageBuilderFactory());
    }

        return new EncryptParser();
    }

    @Override
    protected ParserRequest.Builder createParserRequestBuilder(String[] args) {
        return ParserRequest.mvnenc(args, createMessageBuilderFactory());
    }

        return new ShellParser();
    }

    @Override
    protected ParserRequest.Builder createParserRequestBuilder(String[] args) {
        return ParserRequest.mvnsh(args, createMessageBuilderFactory());
    }