I am trying to use the JLibs I18N library. For the dependencies, I have added the JAR files (i18n and i18n-apt) to the Eclipse Build Path:

Next, I simply use the sample source code as posted on the website.
import jlibs.core.util.i18n.I18N;
import jlibs.core.util.i18n.Message;
import jlibs.core.util.i18n.ResourceBundle;
@ResourceBundle
public interface DBBundle{
public static final DBBundle DB_BUNDLE = I18N.getImplementation(DBBundle.class);
@Message("SQL Execution completed in {0} seconds with {1} errors")
public String executionFinished(long seconds, int errorCount);
@Message(key="SQLExecutionException", value="Encountered an exception while executing the following statement:\n{0}")
public String executionException(String query);
@Message("executing {0}")
public String executing(String query);
}
So far I get no compiler errors, which is great.
Moving on in the tutorial, it says
When you compile this interface with jlibs-core.jar in classpath, it will generate Bundle.properties which contains the messages
So I also put jlibs-core into the classpath of Eclipse (see screenshot above) and performed a rebuild. Unfortunately, no Bundle.properties file is created, which I checked with Search Everything: every file is from May or older:

What else do I need to make Jlibs compile the I18N interface?