write into hdfs using avro

[Rinat]

Hi, folks !

I’ve got a little question, I’m trying to save stream of events from Kafka into 
HDSF using org.apache.flink.streaming.connectors.fs.bucketing.BucketingSink 
with AVRO serialization. 
If I properly understood, I should use some implementation of 
org.apache.flink.streaming.connectors.fs.Writer<T> for this purposes.

I found an existing implementation of avro writer 
org.apache.flink.streaming.connectors.fs.AvroKeyValueSinkWriter<K, V>, but my 
stream contains only value. 
What I need to do, if I want to write values from stream using a BucketingSing 
in avro format ?

Thx.