OuputResource abstraction for file / stream output. Would remove some of the non-batch specific common code in the open()/close() methods of the OutputSources. E.g.

if (file.exists()) {
if (os.shouldDeleteIfExists) {
file.delete();
}
else {
throw new IOException("Resource already exists: " + resource);
}
}
file.createNewFile();

There is no wrapper for an output stream in Spring Core, but maybe it would port over if we get it working.