javadoc generation: base class for anonymous (IDEA-132362)

java/java-tests/testData/codeInsight/javadocIG/anonymousAndSuperJavadoc.java

@@ -0,0 +1,18 @@
+class Bar {
+    public static void main(String[] args) {
+        new Foo() {
+            @Override
+            public void foo() {
+
+            }
+        };
+    }
+}
+
+interface Foo {
+    /**
+     * some javadoc
+     */
+    void foo();
+
+}