@Override
    public IAnnotationHover getAnnotationHover(ISourceViewer sourceViewer) {
        return new SQLAnnotationHover(getSQLEditor());
    }
Returns the annotation hover which will provide the information to be
shown in a hover popup window when requested for the given
source viewer.

@see org.eclipse.jface.text.source.SourceViewerConfiguration#getAnnotationHover(org.eclipse.jface.text.source.ISourceViewer)
plugins/org.jkiss.dbeaver.ui.editors.sql/src/org/jkiss/dbeaver/ui/editors/sql/SQLEditorSourceViewerConfiguration.java