When parsing MIB files, the input file streams are not closed properly when a parse exception is encountered.

It is trivial to fix by adding a finally clause to the MibLoader though.

In MibLoader.MibSource.parseMib:

            } finally {
                try {
                    input.close();
                } catch (Throwable ignore) {
                    // Errors on close are ignored
                }
                analyzer.reset();
            }