Enable checkstyle Javadoc Comment Style rule

Turn on the Javadoc Comment Style rule and fix
any violations that come up.  This is related to
requiring javadoc description comments to end
with a '.'

Change-Id: I19cf1b9f00d3040987e0b4c8b39461e2e0ad66b5
diff --git a/src/main/java/net/onrc/onos/core/datastore/IKVClient.java b/src/main/java/net/onrc/onos/core/datastore/IKVClient.java
index 50bdf92..0fa1cbd 100644
--- a/src/main/java/net/onrc/onos/core/datastore/IKVClient.java
+++ b/src/main/java/net/onrc/onos/core/datastore/IKVClient.java
@@ -6,7 +6,7 @@
 import net.onrc.onos.core.datastore.IKVTable.IKVEntry;
 
 /**
- * Interface for a client class used to access the Key-Value store
+ * Interface for a client class used to access the Key-Value store.
  */
 public interface IKVClient {
 
@@ -85,7 +85,7 @@
     // give an option to improve performance on some backends.
 
     /**
-     * Remove an existing Key-Value entry in table
+     * Remove an existing Key-Value entry in table.
      *
      * @param tableId
      * @param key
@@ -98,7 +98,7 @@
             throws ObjectDoesntExistException, WrongVersionException;
 
     /**
-     * Remove a Key-Value entry in table
+     * Remove a Key-Value entry in table.
      *
      * @param tableId
      * @param key
@@ -134,7 +134,7 @@
     public IMultiEntryOperation forceDeleteOp(IKVTableID tableId, byte[] key);
 
     /**
-     * Batch delete operation
+     * Batch delete operation.
      *
      * @param ops delete operations
      * @return true if failed operation exists
@@ -142,7 +142,7 @@
     public boolean multiDelete(final Collection<IMultiEntryOperation> ops);
 
     /**
-     * Batch write operation
+     * Batch write operation.
      *
      * @param ops write operations
      * @return true if failed operation exists
@@ -150,7 +150,7 @@
     public boolean multiWrite(final List<IMultiEntryOperation> ops);
 
     /**
-     * Batch read operation
+     * Batch read operation.
      *
      * @param ops read operations
      * @return true if failed operation exists