Runtime.getRuntime().addShutdownHook(cleanupWarning);
    }

    private void maybeWarnAboutCleanUp() {
        if (warnAboutCleanup) {
            System.out.println("[WARNING] TestFileManager from: " + callerInfo.getClassName() + " not cleaned up!");
        }
    }

    public void markForDeletion(File toDelete) {
        filesToDelete.add(toDelete);
        warnAboutCleanup = true;
    }