Fix: Add missing covers annotation

[localheinz]

This PR

• adds missing @covers annotations

Follows #310.

[codecov]

Codecov Report

Merging #312 into main will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main     #312   +/-   ##
=========================================
  Coverage     98.95%   98.95%           
  Complexity      103      103           
=========================================
  Files            23       23           
  Lines           287      287           
=========================================
  Hits            284      284           
  Misses            3        3           

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