Explaining errors

[bioinfornatics]

Hi you could to add something like:

private static boolean hasErrors(File f, final List<GeneratedImage> list) throws IOException {
        boolean result = false;
        for (GeneratedImage i : list) {
            final int lineError = i.lineErrorRaw();
            if (lineError != -1) {
                Log.error("Error line " + lineError + " in file: " + f.getCanonicalPath());
                result = true;
            }
        }

To explaining while plnatuml fail to generate images