class Resources : AutoCloseable {
  val resources = mutableListOf<AutoCloseable>()

  fun <T: AutoCloseable> T.use(): T {
    resources += this
    return this
  }

  override fun close() {
    var exception: Exception? = null
    resources.reversed().forEach { resource ->
      try {
        resource.close()
      } catch (closeException: Exception) {
        if (exception == null) {
          exception = closeException
        } else {
          exception.addSuppressed(closeException)
        }
      }
    }
    if (exception != null) throw exception
  }
}

inline fun <T> withResources(block: Resources.() -> T): T = Resources().use(block)

withResources {
  val connection = getConnection().use()
  val statement = connection.createStatement().use()
  val resultSet = statement.executeQuery(sql).use()
  while (resultSet.next()) { ... }
}