AppConfig.java

import org.springframework.context.annotation.Configuration;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;

@Configuration
public class AppConfig {
  @Bean
  public Initializer initializer() {
    return new Initializer();
  }
}

Initializer.java

public class Initializer() {
  public Initializer() {
    // Run some init code
  }
}