diff --git a/internal/storage/event_writer.go b/internal/storage/event_writer.go
index 69835efe09..be0ba6bea3 100644
--- a/internal/storage/event_writer.go
+++ b/internal/storage/event_writer.go
@@ -109,6 +109,7 @@ func ReadDescriptorEvent(buffer io.Reader) (*descriptorEvent, error) {
 	}, nil
 }
 
+// EventWriter abstracts event writer
 type EventWriter interface {
 	PayloadWriterInterface
 	// Finish set meta in header and no data can be added to event writer