Cleaned up JavaAPI and added copyright header.

Signed-off-by: Jonas Bonér <jonas@jonasboner.com>

akka-actor/src/main/scala/akka/japi/JavaAPI.scala

@@ -1,55 +1,58 @@
+/**
+ * Copyright (C) 2009-2011 Typesafe Inc. <http://www.typesafe.com>
+ */
+
 package akka.japi
 
 import scala.Some
 
 /**
- * A Function interface. Used to create first-class-functions is Java (sort of).
+ * A Function interface. Used to create first-class-functions is Java.
  */
 trait Function[T, R] {
   def apply(param: T): R
 }
 
 /**
- * A Function interface. Used to create 2-arg first-class-functions is Java (sort of).
+ * A Function interface. Used to create 2-arg first-class-functions is Java.
  */
 trait Function2[T1, T2, R] {
   def apply(arg1: T1, arg2: T2): R
 }
 
 /**
- * A Procedure is like a Function, but it doesn't produce a return value
+ * A Procedure is like a Function, but it doesn't produce a return value.
  */
 trait Procedure[T] {
-  def apply(param: T): Unit
+  def apply(param: T)
 }
 
 /**
- * A Procedure is like a Function, but it doesn't produce a return value
+ * A Procedure is like a Function, but it doesn't produce a return value.
  */
 trait Procedure2[T1, T2] {
-  def apply(param: T1, param2: T2): Unit
+  def apply(param: T1, param2: T2)
 }
 
 /**
  * An executable piece of code that takes no parameters and doesn't return any value.
  */
 trait SideEffect {
-  def apply: Unit
+  def apply()
 }
 
 /**
  * An executable piece of code that takes no parameters and doesn't return any value.
  */
 trait Effect {
-  def apply: Unit
+  def apply()
 }
 
 /**
- * + * A constructor/factory, takes no parameters but creates a new value of type T every call
+ * A constructor/factory, takes no parameters but creates a new value of type T every call.
- * +
  */
 trait Creator[T] {
-  def create: T
+  def create(): T
 }
 
 /**