Java code:

Exception thrown = null;

try {
        // entire body of bigass method, with like a million different lines that can throw
} catch(Exception e) {
        thrown = e;
} finally {
        // cleanup code with a shitload of branching since we don't have any idea what was going on when the exception got thrown
        if(thrown != null) {
                throw new Exception("worthless, unhelpful message, usually punctuated with four or five exclamation points");
        }
}