Minor

Also, I hope that today I will fill another change regarding ClassIndex:

 * adding methods with ClassLoader argument
 * recheck classes for incremental compilation (with incremental compilation after removing annotation class remains in the index)
 * replace "UTF-8" with StandardCharsets.UTF-8 (JDK7+)

I'm don't add InvalidArgumentException for non-annotated classes/annotations - it's break non annotation driven mode :(

I think this is the last my pull request for the foreseeable future :)