bin/sinatragen in sinatra_generator-0.0.1 vs bin/sinatragen in sinatra_generator-0.0.2

@@ -1,7 +1,12 @@
 #!/usr/bin/env ruby
 
-require 'sinatra_generator'
+if ARGV[0]
+  require 'sinatra_generator'
 
-generator = SinatraGenerator::Generator.new
-generator.new_app ARGV[0]
-puts "new app generated." 
+  generator = SinatraGenerator::Generator.new
+  generator.new_app ARGV[0]
+  puts "new app generated." 
+else
+  puts "Usage: sinatragen [FOLDER_NAME]"
+end
+