Minor Waveform Service Fixes

Steps to reproduce

This patch fixes a few minor issues with the waveform service. Most
notably, this will not allow the service to directly overwrite any
file but will let the operation fail instead to indicate that there is
an actual problem.

Assignee

Lars Kiesow

Reporter

Lars Kiesow

Severity

Data Loss/Corruption

Tags (folksonomy)

None

Components

Affects versions

Priority

Major
Configure