UnnecessaryModifier PMD warning in generated code (private constructor for enums)

[lasselindqvist]

The tool generates code that causes PMD UnnecessaryModifier warnings for generated enums .
(https://pmd.github.io/latest/pmd_rules_java_codestyle.html#unnecessarymodifier)
It might make sense to change the autogenerated code not to have

    private SomeEnum(String value) {
        this.value = value;
    }

but

SomeEnum(String value) {
    this.value = value;
}

enum constructor definitions.