var codeExplorerCommands = Assembly.GetExecutingAssembly().GetTypes()
                .Where(type => type.IsClass && type.Namespace != null &&
                               type.CustomAttributes.Any(a => a.AttributeType == typeof(CodeExplorerCommandAttribute)));

public static int GetRandomNumber() => 42;  // look ma, no state!

- return type name should be `Database`
- first parameter name should be properly camel-cased
- either declare all parameters final or none
- don't declare you throw exceptions that you don't
- Using the rawtype `Class` instead of `Class<?>`
- using the deprecated `Class#newInstance` instead of correctly obtaining a Constructor instance first and using that
- catching Exception
- e.printStackTrace() used **at all**
- return null instead of throwing that exception you declared
- using property injection instead of ctor injection with `ret.setProperties`

Dear Vogel,
    Please don't ever come near my codebase, you'll find many things wrong with it.

Sincerely,
    A coder that wants to remain oblivious.