ex.

 command = File.basename($0)
 begin
   main = Kwalify::Main.new(command)
   s = main.execute
   print s if s
 rescue Kwalify::CommandOptionError => ex
   $stderr.puts "ERROR: #{ex.message}"
   exit 1
 rescue Kwalify::KwalifyError => ex
   $stderr.puts "ERROR: #{ex.message}"
   exit 1
 end