Exceptions should be chained

[reckart]

When an exception is caught and a new exception is generated, the old exception should be chained into the new one (unless there is a very good reason not to do it and this should be document in a code comment).

Also, when an exception is handled and thrown up/chained into a new exception, it should normally be unnecessary to log it because it should be expected that the exception is handled again at a higher level leading to the problem likely being logged twice.

[reckart]

Already covered by #187.