class Linter
  def lint
    raise NotImplementedError, 'uuhh Oh!, you forgot to implement lint method!'
  end
end

class JsonLinter < Linter
  def lint(file)
    # code to lint the json file
    puts "linting #{file}"
  end
end

class RubyLinter < Linter
  def lint(file)
    # code to lint the Ruby file
    puts "linting #{file}"
  end
end

JsonLinter.new.lint(file)
# outputs the lint Json file

RubyLinter.new.lint(file)
# outputs the lint Ruby file