jodd-jtx/src/main/java/jodd/jtx/JtxTransactionManager.java
protected <E> JtxResourceManager<E> lookupResourceManager(final Class<E> resourceType) {
		//noinspection unchecked
		JtxResourceManager<E> resourceManager = this.resourceManagers.get(resourceType);
		if (resourceManager == null) {
			throw new JtxException("No registered resource manager for resource type: " + resourceType.getSimpleName());
		}
		return resourceManager;
	}
protected <E> JtxResourceManager<E> lookupResourceManager(final Class<E> resourceType) {
		//noinspection unchecked
		JtxResourceManager<E> resourceManager = this.resourceManagers.get(resourceType);
		if (resourceManager == null) {
			throw new JtxException("No registered resource manager for resource type: " + resourceType.getSimpleName());
		}
		return resourceManager;
	}
Lookups resource manager for provided type. Throws an exception if provider doesn't exists.