public File processSources(Map<String, Object> map) throws MojoExecutionException {
final String[] included = scanIncludedFiles();
// configure a resolver for catalog files
final CatalogManager catalogManager = createCatalogManager();
final CatalogResolver catalogResolver = new CatalogResolver(catalogManager);
// configure a resolver for urn:dockbx:stylesheet
final URIResolver uriResolver = createStyleSheetResolver(catalogResolver);
// configure a resolver for xml entities
final InjectingEntityResolver injectingResolver = createEntityResolver(catalogResolver);