8247959: doclint errors in NIO code

Reviewed-by: alanb, lancea

Author: jonathan-gibbons

src/jdk.nio.mapmode/share/classes/jdk/nio/mapmode/ExtendedMapMode.java

@@ -25,6 +25,8 @@
 
 package jdk.nio.mapmode;
 
+import java.nio.MappedByteBuffer;
+import java.nio.channels.FileChannel;
 import java.nio.channels.FileChannel.MapMode;
 
 /**
@@ -52,7 +54,7 @@ private ExtendedMapMode() { }
 
     /**
      * File mapping mode for a read-write mapping of a file backed by
-     * non-volatile RAM. {@linkplain MappedByteBufefr#force force}
+     * non-volatile RAM. {@linkplain MappedByteBuffer#force force}
      * operations on a buffer created with this mode will be performed
      * using cache line writeback rather than proceeding via a file
      * device flush.

src/jdk.sctp/share/classes/com/sun/nio/sctp/NotificationHandler.java

@@ -45,7 +45,7 @@
  * this handler interface as the type for parameters, return type, etc. rather
  * than the abstract class.
  *
- * @param  T  The type of the object attached to the receive operation
+ * @param  <T>  The type of the object attached to the receive operation
  *
  * @since 1.7
  */