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The DSI utilities are a mishmash of classes accumulated during the last twenty years in projects developed at the DSI (Dipartimento di Scienze dell'Informazione, i.e., Information Sciences Department), now DI (Dipartimento di Informatica, i.e., Informatics Department), of the Universita` degli Studi di Milano.

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package it.unimi.dsi.io;

/*
 * DSI utilities
 *
 * Copyright (C) 2006-2019 Sebastiano Vigna
 *
 *  This library is free software; you can redistribute it and/or modify it
 *  under the terms of the GNU Lesser General Public License as published by the Free
 *  Software Foundation; either version 3 of the License, or (at your option)
 *  any later version.
 *
 *  This library is distributed in the hope that it will be useful, but
 *  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 *  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 *  for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program; if not, see .
 *
 */
import java.io.Closeable;

/** A marker interface for a closeable resource that implements safety measures to
 * make resource tracking easier.
 *
 * Classes implementing this interface must provide a safety-net finaliser—a
 * finaliser that closes the resource and logs that resource should have been closed.
 *
 * 
When the implementing class is abstract, concrete subclasses must
 * call super.close() in their own {@link java.io.Closeable#close()} method
 * to let the abstract class track correctly the resource. Moreover,
 * they must run super.finalize() in
 * their own finaliser (if any), as finalisation chaining is not automatic.
 *
 * Note that if a concrete subclass implements readResolve(), it must
 * call super.close(), or actually return this (i.e., the deserialised
 * instance); otherwise, a spurious log could be generated when the deserialised instance is collected.
 *
 * @author Sebastiano Vigna
 * @since 1.1
 */

public interface SafelyCloseable extends Closeable {}