Javadoc corrections

Author: Lee Rhodes

memory/src/main/java/com/yahoo/memory/Memory.java

@@ -14,7 +14,7 @@
  * The methods of this interface leverage the capabilities of the sun.misc.Unsafe class.
  *
  * <p>In contrast to the <i>java.nio.ByteBuffer</i> classes, which were designed for native
- * streaming I/O and include concepts such as <i>position, limit, mark, flip,</i> and <i>rewind</i>,
+ * streaming I/O and include concepts such as <i>position, limit, mark, flip</i> and <i>rewind</i>,
  * this interface specifically bypasses these concepts and instead provides a rich collection of
  * primitive, bit, array and copy methods that access the data directly from a single byte offset.
  *

sketches/src/main/java/com/yahoo/sketches/quantiles/DoublesUpdateImpl.java

@@ -13,7 +13,7 @@
  * @author Lee Rhodes
  * @author Kevin Lang
  */
-public class DoublesUpdateImpl {
+class DoublesUpdateImpl {
 
   static void growBaseBuffer(final DoublesSketch sketch) { //n has not been incremented yet
     final double[] baseBuffer = sketch.getCombinedBuffer(); //in this case it is just the BB

sketches/src/main/java/com/yahoo/sketches/sampling/SamplingUtil.java

@@ -7,7 +7,7 @@
  *
  * @author Jon Malkin
  */
-public class SamplingUtil {
+class SamplingUtil {
 
   public static final Random rand = new Random();