make all constructors private

Author: samuelgruetter

language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/Notification.scala

@@ -8,7 +8,7 @@ sealed trait Notification[+T] {
 }
 
 /**
- * Provides pattern matching support for Notifications.
+ * Provides pattern matching support and constructors for Notifications.
  * 
  * Example:
  * {{{

language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/Observable.scala

@@ -20,6 +20,7 @@ package rx.lang.scala
 /**
  * The Observable interface that implements the Reactive Pattern.
  */
+// constructor is private because users should use apply in companion
 class Observable[+T] private[scala] (val asJava: rx.Observable[_ <: T])
   // Uncommenting this line combined with `new Observable(...)` instead of `new Observable[T](...)`
   // makes the compiler crash

language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/observables/BlockingObservable.scala

@@ -23,6 +23,7 @@ import rx.lang.scala.ImplicitFunctionConversions._
  * 
  * You can obtain a BlockingObservable from an Observable using [[Observable.toBlockingObservable]]
  */
+// constructor is private because users should use Observable.toBlockingObservable
 class BlockingObservable[+T] private[scala] (val asJava: rx.observables.BlockingObservable[_ <: T]) 
   extends AnyVal 
 {

language-adaptors/rxjava-scala/src/main/scala/rx/lang/scala/util/Timestamped.scala

@@ -3,7 +3,8 @@ package rx.lang.scala.util
 /**
  * Wraps a value and a timestamp.
  */
-class Timestamped[+T](val asJava: rx.util.Timestamped[_ <: T]) extends AnyVal {
+// constructor is private because users should use apply from companion
+class Timestamped[+T] private[util] (val asJava: rx.util.Timestamped[_ <: T]) extends AnyVal {
   /**
    * Returns the timestamp, in milliseconds.
    */