@@ -0,0 +1,260 @@
+package org.helioviewer.jhv.timelines.data;%0A%0Apublic interface DataProvider %7B%0A%0A    public abstract void updateBand(Band band, long start, long end);%0A%0A    public abstract void stopDownloads(Band band);%0A%0A    public abstract boolean isDownloadActive(Band band);%0A%7D%0A

Introduce dataprovider