src/java.base/share/classes/java/io/OutputStream.java

@@ -45,10 +45,15 @@
  * @see     java.io.OutputStream#write(int)
  * @since   1.0
  */
 public abstract class OutputStream implements Closeable, Flushable {
     /**
+     * Constructor for subclasses to call.
+     */
+    public OutputStream() {}
+
+    /**
      * Returns a new {@code OutputStream} which discards all bytes.  The
      * returned stream is initially open.  The stream is closed by calling
      * the {@code close()} method.  Subsequent calls to {@code close()} have
      * no effect.
      *