@Configuration
@ComponentScan(basePackages = { "com.example.plugin.feature" })
public class CustomConfig {
  //Custom beans
}

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context" 
	xsi:schemaLocation=" 
		http://www.springframework.org/schema/beans 
		http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
		http://www.springframework.org/schema/context 
		http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 
 
	<context:component-scan base-package="com.example.plugin.config" /> 
 
</beans> 

import com.example.plugin.config.CustomConfig;
import com.aquima.web.boot.RootConfig;

public class WarApplication extends AbstractWarApplication {

  @Override
  protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
	// first initialize the Blueriq configuration, than load your custom configuration
    return RootConfig.configure(application).sources(CustomConfig.class);
  }  
}

@Configuration
@EnableTransactionManagement
@Profile(DataSourceProfile.EXTERNAL_DATASOURCE_PROFILE_NAME)
public class MyPluginExternalConfig {

  @Autowired
  private ConfigurableEnvironment configurableEnv;

  @Autowired
  private IBlueriqDataSourceBuilder dataSourceBuilder;
  
  public static final String DATA_SOURCE_NAME = "myPluginDataSource";
  public static final String ENTITY_BASE_PACKAGE = "com.example.plugin.model";
  public static final String SESSION_FACTORY_NAME = "myPluginSessionFactory";
  public static final String TRANSACTION_MANAGER_NAME = "myPluginTransactionManager";
  public static final String PLUGIN_DATASOURCE = "myPluginData";

  @Bean(name = TRANSACTION_MANAGER_NAME)
  public HibernateTransactionManager myPluginTransactionManager(
      @Qualifier(SESSION_FACTORY_NAME) SessionFactory sessionFactory) {
    return new HibernateTransactionManager(sessionFactory);
  }

  @RefreshScope
  @Bean(name = SESSION_FACTORY_NAME)
  public LocalSessionFactoryBean myPluginSessionFactory(
      @Qualifier(DATA_SOURCE_NAME) DataSource dataSource) {
    LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
    sessionFactory.setDataSource(dataSource);
    sessionFactory.setPackagesToScan(ENTITY_BASE_PACKAGE);
    sessionFactory.setHibernateProperties(
        DatasourcePropertiesUtil.getHibernateProperties(configurableEnv, PLUGIN_DATASOURCE));
    return sessionFactory;
  }

  @RefreshScope
  @Bean(name = DATA_SOURCE_NAME)
  public DataSource myPluginDataSource() {
    return dataSourceBuilder.buildDataSource(PLUGIN_DATASOURCE);
  }
}

$ mvn clean verify