Java 8 Functional Programming - Passing function along with its argument

I have a question on Java 8 Functional Programming. I am trying to achieve something using functional programming, and need some guidance on how to do it.

My requirement is to wrap every method execution inside timer function which times the method execution. Here's the example of timer function and 2 functions I need to time.

timerMethod(String timerName, Function func){
  timer.start(timerName)
  func.apply()
  timer.stop()
}

functionA(String arg1, String arg2)

functionB(int arg1, intArg2, String ...arg3)

I am trying to pass functionA & functionB to timerMethod, but functionA & functionB expects different number & type of arguments for execution.

Any ideas how can I achieve it.

Thanks !!