[SPARK-9791] [PACKAGE] Change private class to private class to prevent unnecessary classes from showing up in the docs

In addition, some random cleanup of import ordering

Author: Tathagata Das <tathagata.das1565@gmail.com>

Closes #8387 from tdas/SPARK-9791 and squashes the following commits:

67f3ee9 [Tathagata Das] Change private class to private[package] class to prevent them from showing up in the docs

2 files changed, 4 insertions, 0 deletions

diff --git a/streaming/src/main/java/org/apache/spark/streaming/util/WriteAheadLog.java b/streaming/src/main/java/org/apache/spark/streaming/util/WriteAheadLog.java
index 8c0fdfa9c7..3738fc1a23 100644
--- a/streaming/src/main/java/org/apache/spark/streaming/util/WriteAheadLog.java
+++ b/streaming/src/main/java/org/apache/spark/streaming/util/WriteAheadLog.java
@@ -21,6 +21,8 @@ import java.nio.ByteBuffer;
 import java.util.Iterator;
 
 /**
+ * :: DeveloperApi ::
+ *
  * This abstract class represents a write ahead log (aka journal) that is used by Spark Streaming
  * to save the received data (by receivers) and associated metadata to a reliable storage, so that
  * they can be recovered after driver failures. See the Spark documentation for more information
diff --git a/streaming/src/main/java/org/apache/spark/streaming/util/WriteAheadLogRecordHandle.java b/streaming/src/main/java/org/apache/spark/streaming/util/WriteAheadLogRecordHandle.java
index 02324189b7..662889e779 100644
--- a/streaming/src/main/java/org/apache/spark/streaming/util/WriteAheadLogRecordHandle.java
+++ b/streaming/src/main/java/org/apache/spark/streaming/util/WriteAheadLogRecordHandle.java
@@ -18,6 +18,8 @@
 package org.apache.spark.streaming.util;
 
 /**
+ * :: DeveloperApi ::
+ *
  * This abstract class represents a handle that refers to a record written in a
  * {@link org.apache.spark.streaming.util.WriteAheadLog WriteAheadLog}.
  * It must contain all the information necessary for the record to be read and returned by