code: public synchronized void delete() {
  		try {
  			clear();
  		} catch (Exception ign) {
  		}
  		try {
  			close();
  		} catch (Exception ign) {
  		}
  		try {
  			fileRedo.delete();
  		} catch (Exception ign) {
  		}
  		try {
  			fileStorage.delete();
  		} catch (Exception ign) {
  		}
  		try {
  			fileFreeBlocks.delete();
  		} catch (Exception ign) {
  		}
  	}
docs: Clear tree and Delete associated files