RecoveryListener class need comments to clarify

[RecoveryListener](https://github.com/rabbitmq/rabbitmq-java-client/blob/94fd11bed387a81f5c0dbd90d90eb728417ed067/src/main/java/com/rabbitmq/client/RecoveryListener.java) class methods need some clarification with comments I think. 

Which one is for before/after/while recovery process? 