TreeColumn tc3 = new TreeColumn(tv.getTree(),SWT.MULTI);
tc3.setText("Comment");
tc3.setWidth(200);
tfp = new TreeFilesProvider();
tflp = new TreeFilesLabelProvider();
ts = new TreeSorter();
tv.setContentProvider(tfp);
tv.setLabelProvider(tflp);
tv.setSorter(ts);