private Put createPutForIncrBackupTableSet(Set<TableName> tables, String backupRoot) {
    Put put = new Put(rowkey(INCR_BACKUP_SET, backupRoot));
    for (TableName table : tables) {
      put.addColumn(BackupSystemTable.META_FAMILY, Bytes.toBytes(table.getNameAsString()),
        EMPTY_VALUE);
    }
    return put;
  }
Creates Put to store incremental backup table set
@param tables tables
@return put operation
hbase-backup/src/main/java/org/apache/hadoop/hbase/backup/impl/BackupSystemTable.java