The static initialiser has been replace by a lazy initialiser, allowing for loading the class without provoking a query to the database.

LazyInitialiserDependency.java

public class LazyInitialiserDependency {

    private static Map<String, Object> translationMap;

    // no more static initaliser, the class is mockable, though we'll have to go further by
    // adding a version of getTranslation as an instance method if we want to mock it

    // this static method is called by the class you'd like to test
    public static String getTranslation(String key, Locale locale) {
        Object keys = getTranslationMap().get(locale.toString());
        // logic ...
        // etc ...

        return null;
    }

    private static void initialiseTranslationMap() {
        translationMap = HibernateUtil.executeQuery("Select ...");
    }

    private static Map<String, Object> getTranslationMap() {
        if (translationMap == null) {
            initialiseTranslationMap();
        }
        return translationMap;
    }
}