diff --git a/library/core/src/main/java/com/google/android/exoplayer2/metadata/MetadataOutput.java b/library/core/src/main/java/com/google/android/exoplayer2/metadata/MetadataOutput.java
index d203ffd801..0eb64d75c0 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/metadata/MetadataOutput.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/metadata/MetadataOutput.java
@@ -15,6 +15,7 @@
  */
 package com.google.android.exoplayer2.metadata;
 
+
 /** Receives metadata output. */
 public interface MetadataOutput {