2971 Adding new files fails

[squaregoldfish]

Fix #2971

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.

Project coverage is 29.17%. Comparing base (e8fc365) to head (8c67351). Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...ac/exeter/QuinCe/data/Files/FileStoreDataFile.java	0.00%	9 Missing :warning:
...p/src/uk/ac/exeter/QuinCe/data/Files/DataFile.java	0.00%	6 Missing :warning:
...c/exeter/QuinCe/data/Files/DataFileFromUpload.java	0.00%	6 Missing :warning:
...k/ac/exeter/QuinCe/web/files/UploadedDataFile.java	0.00%	4 Missing :warning:
...src/uk/ac/exeter/QuinCe/data/Files/DataFileDB.java	0.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2972 +/- ## ============================================ - Coverage 29.18% 29.17% -0.02% Complexity 1972 1972 ============================================ Files 386 388 +2 Lines 19864 19874 +10 Branches 2662 2662 ============================================ Hits 5798 5798 - Misses 13655 13665 +10 Partials 411 411 ``` | [Flag](https://app.codecov.io/gh/quince-science/QuinCe/pull/2972/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=quince-science) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/quince-science/QuinCe/pull/2972/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=quince-science) | `29.17% <0.00%> (-0.02%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=quince-science#carryforward-flags-in-the-pull-request-comment) to find out more.

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