try {
	OutputStream os = new FileOutputStream(file.getAbsolutePath());
	NBTOutputStream n = new NBTOutputStream(os);

	Tag tag = new StringTag("Data.LevelName", "test");
	n.writeTag(tag);
	n.close();

	System.out.println("[World Reset] Successfully edited level.dat...");
} catch (IOException e) {
	System.out.println("[World Reset] Failed to edit level.dat...")
}