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Message: [QUOTE="Ian Shef, post: 4220042"] Maybe yes, maybe no. If you don't have a benchmark that shows it to be an issue, don't worry about it. Initializing the databas manager is probably going to be a lot more preformance-consuming than anything else that you are doing here. Well, actually you _do_ know the type for db, you just didn't show us directly; apparently it is DB. What you don't know at compile time is the implementation. I prefer to use java.util.ServiceLoader myself. It means that you have to have "a provider-configuration file in the resource directory META- INF/services" instead of a property or a value in a separate configuration file. This could be a good thing or a bad thing, depending upon your application. [/QUOTE]