private void createDexFile() {
    outputDex = new DexFile(args.dexOptions);

    if (args.dumpWidth != 0) {
      outputDex.setDumpWidth(args.dumpWidth);
    }
  }
Constructs the output {@link DexFile}, fill it in with all the specified classes, and populate
the resources map if required.

@return whether processing was successful
android/android_framework/dex-maker/src/main/java/com/android/dx/command/dexer/Main.java