--- a/jdk/src/java.base/share/classes/java/util/stream/Sink.java	Wed Sep 16 08:24:40 2015 -0400
+++ b/jdk/src/java.base/share/classes/java/util/stream/Sink.java	Tue Sep 15 21:56:04 2015 -0700
@@ -241,7 +241,7 @@
      * implementation of the {@code accept()} method must call the correct
      * {@code accept()} method on the downstream {@code Sink}.
      */
-    static abstract class ChainedReference<T, E_OUT> implements Sink<T> {
+    abstract static class ChainedReference<T, E_OUT> implements Sink<T> {
         protected final Sink<? super E_OUT> downstream;
 
         public ChainedReference(Sink<? super E_OUT> downstream) {
@@ -273,7 +273,7 @@
      * The implementation of the {@code accept()} method must call the correct
      * {@code accept()} method on the downstream {@code Sink}.
      */
-    static abstract class ChainedInt<E_OUT> implements Sink.OfInt {
+    abstract static class ChainedInt<E_OUT> implements Sink.OfInt {
         protected final Sink<? super E_OUT> downstream;
 
         public ChainedInt(Sink<? super E_OUT> downstream) {
@@ -305,7 +305,7 @@
      * The implementation of the {@code accept()} method must call the correct
      * {@code accept()} method on the downstream {@code Sink}.
      */
-    static abstract class ChainedLong<E_OUT> implements Sink.OfLong {
+    abstract static class ChainedLong<E_OUT> implements Sink.OfLong {
         protected final Sink<? super E_OUT> downstream;
 
         public ChainedLong(Sink<? super E_OUT> downstream) {
@@ -337,7 +337,7 @@
      * The implementation of the {@code accept()} method must call the correct
      * {@code accept()} method on the downstream {@code Sink}.
      */
-    static abstract class ChainedDouble<E_OUT> implements Sink.OfDouble {
+    abstract static class ChainedDouble<E_OUT> implements Sink.OfDouble {
         protected final Sink<? super E_OUT> downstream;
 
         public ChainedDouble(Sink<? super E_OUT> downstream) {