plot.setGap(0);
plot.add(gcContentChart.getChart().getXYPlot(),1);
plot.setOrientation(PlotOrientation.VERTICAL);
JFreeChart combinedChart = new JFreeChart("Coverage across reference",plot);
combinedChart.setPadding(new RectangleInsets(30,20,30,20));
combinedChart.addSubtitle(coverageChart.getChart().getSubtitle(0));
charts.add(new QChart(bamStats.getName() + "_coverage_across_reference.png", combinedChart, coverageChart) );
if (bamStats.getNumberOfMappedBases() == 0) {
// It doesn't make sense to draw any other graphs
// TODO: show user a message?