ada-case-exception-file is a variable defined in `ada-mode.el'.
Its value is

List of special casing exceptions dictionaries for identifiers.
The first file is the one where new exceptions will be saved by Emacs
when you call `ada-create-case-exception'.

These files should contain one word per line, that gives the casing
to be used for that word in Ada files. If the line starts with the
character *, then the exception will be used for substrings that either
start at the beginning of a word or after a _ character, and end either
at the end of the word or at a _ character. Each line can be terminated
by a comment.

You can customize this variable.