Saving a Writer File

Is Java necessary just to save a Writer (ODT) file? Writer works for entering and editing text without Java. Libre Office can save a spreadsheet without Java. But when I try to save a Writer file Libre Office hangs. I tried to report this as a bug. The response was in effect that MAYBE if I installed Java that MIGHT solve the problem. Libre Office (and some earlier versions), Mac OS X 10.10.5.