Connections, streams, files, and other classes that implement the ``++Closeable++`` interface or its super-interface, ``++AutoCloseable++``, needs to be closed after use. Further, that ``++close++`` call must be made in a ``++finally++`` block otherwise an exception could keep the call from being made. Preferably, when class implements ``++AutoCloseable++``, resource should be created using "try-with-resources" pattern and will be closed automatically.
Failure to properly close resources will result in a resource leak which could bring first the application and then perhaps the box the application is on to their knees.
