package com.google.checkstyle.test.chapter2filebasic.rule21filename;
   
   // violation below 'The name of the outer type and the file do not match.'
   @interface MyAnnotation2 {
     String name();
   
     int version();
   }
   
  // violation below 'Top-level class InputFileName3 has to reside in its own source file.'
  @MyAnnotation2(name = "ABC", version = 1)
  class InputFileName3 {} // ok
  
  // violation below 'Top-level class Enum2 has to reside in its own source file.'
  enum Enum2 { // ok
    A,
    B,
    C;
  
    Enum2() {}
  
    public String toString() {
      return ""; // some custom implementation
    }
  }
  
  // violation below 'Top-level class TestRequireThisEnum2 has to reside in its own source file.'
  interface TestRequireThisEnum2 { // ok
    enum DayOfWeek {
      SUNDAY,
      MONDAY,
      TUESDAY,
      WEDNESDAY,
      THURSDAY,
      FRIDAY,
      SATURDAY
    }
  }