package com.google.checkstyle.test.chapter2filebasic.rule21filename;
   
   @interface MyAnnotation1 { //ok
       String name();
       int version();
   }
   
   @MyAnnotation1(name = "ABC", version = 1)
   public class InputOuterTypeFilename1 //ok
  {
  
  }
  
  enum Enum1 //ok
  {
      A, B, C;
      Enum1() {}
      public String toString() {
          return ""; //some custom implementation
      }
  }
  
  interface TestRequireThisEnum //ok
  {
      enum DAY_OF_WEEK
      {
          SUNDAY,
          MONDAY,
          TUESDAY,
          WEDNESDAY,
          THURSDAY,
          FRIDAY,
          SATURDAY
      }
  }