error handling for writing json

sorter.rb

@@ -47,10 +47,13 @@ end
 # output - a hash containing all of our output
 #This method converts the output hash to JSON and writes it to "output.json"
 def write_output_json (output, filename)
-  pp output
+  begin
     outfile = File.open(filename,'w')
     outfile.write(output.to_json)
     outfile.close
+  rescue
+    pp output
+    abort
 end
 
 def write_output_csv (output, filename)