XML OEM file missing data tags

Exporting an OEM file in XML format is missing the <data>...</data> tags around the state vectors. As discussed in this forum post.

Generating an XML-formatted OEM file as follows

        OrekitEphemerisFile ephemerisFile = new OrekitEphemerisFile();
        OrekitEphemerisFile.OrekitSatelliteEphemeris satelliteEphemeris = ephemerisFile.addSatellite(satId);
        satelliteEphemeris.addNewSegment(states);

        OemMetadata template = new OemMetadata(8);
        template.setTimeSystem(TimeSystem.UTC);
        template.setObjectID(satId);
        template.setObjectName(satId);
        template.setCenter(new BodyFacade("EARTH", CelestialBodyFactory.getCelestialBodies().getEarth()));
        template.setReferenceFrame(FrameFacade.map(FramesFactory.getGCRF()));
        EphemerisWriter writer = new EphemerisWriter(new WriterBuilder().buildOemWriter(),
                null, template, FileFormat.XML, "dummy", 60);
        writer.write("output.oem", ephemerisFile);

fails to be imported using the OEM parser:

Exception in thread “main” org.orekit.errors.OrekitException: unexpected keyword in CCSDS line number 21 of file output.oem:
stateVector