diff --git a/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorage.java b/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorage.java
index 2a995998f7e..100903b66ee 100644
--- a/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorage.java
+++ b/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorage.java
@@ -134,7 +134,7 @@ default void compact() throws IOException {}
      *            the lastKey in the range (not included)
      *
      */
-    CloseableIterator<byte[]> keys(byte[] firstKey, byte[] lastKey) throws IOException ;
+    CloseableIterator<byte[]> keys(byte[] firstKey, byte[] lastKey) throws IOException;
 
     /**
      * Return an iterator object that can be used to sequentially scan through all
diff --git a/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorageRocksDB.java b/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorageRocksDB.java
index a90fc1a6e65..45f5b6983e5 100644
--- a/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorageRocksDB.java
+++ b/bookkeeper-server/src/main/java/org/apache/bookkeeper/bookie/storage/ldb/KeyValueStorageRocksDB.java
@@ -39,7 +39,6 @@
 import java.util.Map.Entry;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
-
 import org.apache.bookkeeper.bookie.storage.ldb.KeyValueStorageFactory.DbConfigType;
 import org.apache.bookkeeper.conf.ServerConfiguration;
 import org.rocksdb.BlockBasedTableConfig;