Crash when writing out to .xlsx

[Kyle-Falconer]

The program will crash when trying to write out to the .xlsx file if the file is already open in Excel or any other program with the following log entry:

java.io.FileNotFoundException: output.xlsx (The process cannot access the file because it is being used by another process)
at java.io.FileOutputStream.open(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:212)
at java.io.FileOutputStream.<init>(FileOutputStream.java:165)
at courtscheduler.domain.CourtSchedule.writeXlsx(CourtSchedule.java:319)
at courtscheduler.Main.main(Main.java:68)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:120)

The program should catch this sort of error, prompt the user, and then re-try until either successful or cancelled by the end user.

[pkmccroskey]

1177430 Ready to be tested.

[Kyle-Falconer]

Looks good. Closing this.