[HUDI-379] Refactor the codes based on new JavadocStyle code style rule (#1079)

hudi-common/src/main/java/org/apache/hudi/common/model/EmptyHoodieRecordPayload.java

@@ -25,7 +25,7 @@ import org.apache.avro.generic.GenericRecord;
 import org.apache.avro.generic.IndexedRecord;
 
 /**
- * Empty payload used for deletions
+ * Empty payload used for deletions.
  */
 public class EmptyHoodieRecordPayload implements HoodieRecordPayload<EmptyHoodieRecordPayload> {
 

hudi-common/src/test/java/org/apache/hudi/common/table/log/TestHoodieLogFormat.java

@@ -310,7 +310,7 @@ public class TestHoodieLogFormat extends HoodieCommonTestHarness {
    *       writer.getCurrentSize(); assertTrue("We just wrote a new block - size2 should be > size1", size2 > size1);
    *       assertEquals("Write should be auto-flushed. The size reported by FileStatus and the writer should match",
    *       size2, fs.getFileStatus(writer.getLogFile().getPath()).getLen()); writer.close(); }
-   **/
+   */
 
   @Test
   public void testAppendNotSupported() throws IOException, URISyntaxException, InterruptedException {