final Params params = new Params("data/dir nodes.csv relationships.csv #nodes #max-props-per-node #usual-rels-pernode #max-rels-per-node #max-props-per-rel rel,types",args);
if (params.invalid()) {
System.err.printf("Usage java -jar batchimport.jar %s%n",params);
System.exit(1);
}
File graphDb = params.file("data/dir");
String nodesFile = params.string("nodes.csv");
String relationshipsFile = params.string("relationships.csv");
if (graphDb.exists()) {
FileUtils.deleteRecursively(graphDb);