public Configuration getConf() {
    return conf;
  }
@param conf      must not be null, will keep a reference to read params in later reader/writer
                 instances.
@param factoryId a unique identifier for this factory. used i.e. by filesystem implementations
                 to make a directory
@param abortable the server associated with this WAL file
hbase-server/src/main/java/org/apache/hadoop/hbase/wal/WALFactory.java