Wrap file creation in try/catch

[thomasrockhu]

No description provided.

[codecov]

Codecov Report

Merging #134 (991a1e4) into master (9700fbe) will increase coverage by 0.02%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##           master     #134      +/-   ##
==========================================
+ Coverage   91.84%   91.86%   +0.02%     
==========================================
  Files           3        3              
  Lines         368      369       +1     
==========================================
+ Hits          338      339       +1     
  Misses         30       30              

Impacted Files	Coverage Δ
lib/codecov/formatter.rb	93.87% <60.00%> (+0.12%)	⬆️

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