final RouteConverter r = RouteConverter.getInstance();
tableDownloads.setModel(r.getDataSourceManager().getDownloadManager().getModel());
tableDownloads.setDefaultRenderer(Object.class, new DownloadsTableCellRenderer());
TableCellRenderer headerRenderer = new SimpleHeaderRenderer("description", "state");
TableColumnModel columns = tableDownloads.getColumnModel();
for (int i = 0; i < columns.getColumnCount(); i++) {
TableColumn column = columns.getColumn(i);
column.setHeaderRenderer(headerRenderer);
if (i == 1) {