Creating an external SpringBoot service that lives in its own jar

Question

I'm trying to create a general purpose springboot service in a jar file that can be used across several applications. To do this I have create a jar file (using maven) that has the following:

A set of three classes and one interface in this single jar. They are in their own distinct package:

package com.hmg.generic.service

MyServiceConfig
MyServiceDataSourceConfig
MyService
IMyService 

I have a main application in a separate project, that contains

@ComponentScan(basePackages = {"com.hmg.apps.myapplication","com.hmg.generic.service"})
public class MyApplication extends SpringBootServletInitializer {

My question is, how do I annotate the classes, and do I need any kind of factory method, or helper code, to get the classes in the jar to be instantiated and spun up when the application starts?

When I try to spin up the application I get the following message:

Field config in com.hmg.app.myapplication.MyApplication required a single bean, but 2 were found:
    - myServiceConfig: defined in file [/Users/tgia/Development/source/MyApp/GenericService/target/classes/com/hmg/generic/service/MyServiceConfig.class]
    - com.hmg.generic.service.MyServiceConfig: defined in null