HDFS-13436. Fix javadoc of package-info.java

(cherry picked from commit 9b0b9f2af2f6827d7430f995d3203c4cb7ef7e48)

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/package-info.java

@@ -15,10 +15,10 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-@InterfaceStability.Evolving
-package org.apache.hadoop.hdfs.protocol.datatransfer;
-import org.apache.hadoop.classification.InterfaceStability;
 
 /**
  * This package contains classes related to hdfs data transfer protocol.
- */
+ */
+@InterfaceStability.Evolving
+package org.apache.hadoop.hdfs.protocol.datatransfer;
+import org.apache.hadoop.classification.InterfaceStability;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/connectors/package-info.java

@@ -15,8 +15,6 @@
  * the License.
  */
 
-package org.apache.hadoop.hdfs.server.diskbalancer.connectors;
-
 /**
  * Connectors package is a set of logical connectors that connect
  * to various data sources to read the hadoop cluster information.
@@ -35,3 +33,4 @@ package org.apache.hadoop.hdfs.server.diskbalancer.connectors;
  * we can crate dataNodes on the fly and attach to this connector and
  * ask the diskBalancer Cluster to read data from this source.
  */
+package org.apache.hadoop.hdfs.server.diskbalancer.connectors;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/datamodel/package-info.java

@@ -16,7 +16,6 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.hdfs.server.diskbalancer.datamodel;
 /**
  * Disk Balancer Data Model is the Data Model for the cluster that
  * Disk Balancer is working against. This information is read
@@ -28,4 +27,5 @@ package org.apache.hadoop.hdfs.server.diskbalancer.datamodel;
  * DiskBalancerDataNodes is a collection of DiskBalancerVolumeSets
  * DiskBalancerVolumeSets is a collection of DiskBalancerVolumes
  * DiskBalancerVolumes represents actual volumes on DataNodes.
- */
+ */
+package org.apache.hadoop.hdfs.server.diskbalancer.datamodel;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/package-info.java

@@ -16,7 +16,6 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.hdfs.server.diskbalancer;
 /**
  * Disk Balancer connects to a {@link org.apache.hadoop.hdfs.server.datanode
  * .DataNode} and attempts to spread data across all volumes evenly.
@@ -34,3 +33,4 @@ package org.apache.hadoop.hdfs.server.diskbalancer;
  * 3) Disk Balancer operates against data nodes which are live and operational.
  *
  */
+package org.apache.hadoop.hdfs.server.diskbalancer;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/diskbalancer/planner/package-info.java

@@ -16,7 +16,6 @@
  * limitations under the License.
  */
 
-package org.apache.hadoop.hdfs.server.diskbalancer.planner;
 /**
  * Planner takes a DiskBalancerVolumeSet, threshold and
  * computes a series of steps that lead to an even data
@@ -44,3 +43,4 @@ package org.apache.hadoop.hdfs.server.diskbalancer.planner;
  * //when we are done , return the list of steps
  * return planner;
  */
+package org.apache.hadoop.hdfs.server.diskbalancer.planner;