Add doc + refactor + fix formatting

java/org/rocksdb/Options.java

@@ -508,7 +508,7 @@ public class Options {
     return maxBackgroundCompactions(nativeHandle_);
   }
 
-  /** 
+  /**
    * Creates statistics object which collects metrics about database operations.
      Statistics objects should not be shared between DB instances as
      it does not use any locks to prevent concurrent updates.