geopackage-sdk/src/main/java/mil/nga/geopackage/factory/GeoPackageManagerImpl.java
@Override
    public List<String> externalDatabases() {
        Set<String> sortedDatabases = new TreeSet<String>();
        addExternalDatabases(sortedDatabases);
        List<String> databases = new ArrayList<String>();
        databases.addAll(sortedDatabases);
        return databases;
    }
@Override
    public List<String> externalDatabases() {
        Set<String> sortedDatabases = new TreeSet<String>();
        addExternalDatabases(sortedDatabases);
        List<String> databases = new ArrayList<String>();
        databases.addAll(sortedDatabases);
        return databases;
    }
{@inheritDoc}