Added a basic check to make sure we don't try to transcode a partially written file

src/main.rs

@@ -1,11 +1,11 @@
 use log4rs;
 use config::Config;
-use repository::Repository;
-use transcoder::Transcoder;
+use transcoder::repository::Repository;
+use transcoder::transcoder::Transcoder;
 
 mod config;
-mod repository;
 mod transcoder;
+mod util;
 
 fn main() {
   // initialize the log4rs logger