Create a 'tmp' empty folder while running 'index' command

The system will create a 'tmp' empty folder at the same time as creating the _index file while running 'index' command. The command I use is:

“spark-submit target/beast-uber-spark-0.2.1-SNAPSHOT.jar index Road_Network_Vertices Road_Network_Vertices_index 'iformat:point(1,2)' 'separator: ' gindex:rsgrove”

where “Road_Network_Vertices” is a folder which contains 3 .txt files.