Use better exception handling

[tsimonq2]

Sometimes the user might forget a file, data/yakkety/state/age-policy-dates for example. Instead of throwing FileNotFoundError and just freezing (I can Ctrl + C of course), it should create the file.

Exception handling should be better integrated so this type of error is less likely to ever happen.

[nthykier]

Hi,

Thanks for the report.

I am surprised to hear that Britney freezes (rather than terminating)?

I see no issue with creating the "dates" file automatically. However, I am concerned with generating the urgencies files as it creates a "silent failure" mode for them (where the intended urgencies do not have an effect).