default void addColumnFamily(TableName tableName, ColumnFamilyDescriptor columnFamily)
    throws IOException {
    get(addColumnFamilyAsync(tableName, columnFamily), getSyncWaitTimeout(), TimeUnit.MILLISECONDS);
  }
Add a column family to an existing table. Synchronous operation. Use
{@link #addColumnFamilyAsync(TableName, ColumnFamilyDescriptor)} instead because it returns a
{@link Future} from which you can learn whether success or failure.
@param tableName    name of the table to add column family to
@param columnFamily column family descriptor of column family to be added
@throws IOException if a remote or network exception occurs
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Admin.java