IDEA-120784 "Class is public should be declared in a file named <Classname>.java" for inner interface

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/genericsHighlighting/IDEA21602.java

@@ -1,7 +1,7 @@
 import java.util.Collection;
 import java.util.Collections;
 
-public class IDEABug {
+class IDEABug {
 
   static class ClassA {
     static <T> void sayHello(Collection<? extends T> msg) {}