Gh-3178: Javadoc release file copy problem

[GCHQDeveloper314]

This prevents the situation where mv cannot move if directory not empty

Related issue

• Resolve #3178

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 66.68%. Comparing base (fe1d93a) to head (7d904e3).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## develop #3191 +/- ## ========================================== Coverage 66.68% 66.68% Complexity 2557 2557 ========================================== Files 907 907 Lines 29068 29068 Branches 3241 3241 ========================================== Hits 19385 19385 Misses 8249 8249 Partials 1434 1434 ```

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