I created a BuildWrapper and implemented a tearDown method.
When I try to get the build.getResult() from within this tearDown method the
result is always null.

Reason see code in Build class

protected class RunnerImpl extends AbstractRunner {
protected Result doRun(BuildListener listener) throws Exception {
if(!preBuild(listener,project.getBuilders()))
return Result.FAILURE;
if(!preBuild(listener,project.getPublishers()))
return Result.FAILURE;

buildEnvironments = new ArrayList<Environment>();
try {
List<BuildWrapper> wrappers = new ArrayList<BuildWrapper>
(project.getBuildWrappers().values());

ParametersAction parameters = getAction(ParametersAction.class);
if (parameters != null)
parameters.createBuildWrappers(Build.this,wrappers);

for( BuildWrapper w : wrappers )

{ Environment e = w.setUp((AbstractBuild)Build.this, launcher, listener); if(e==null) return Result.FAILURE; buildEnvironments.add(e); }

if(!build(listener,project.getBuilders()))
return Result.FAILURE;
} finally

{ // tear down in reverse order for( int i=buildEnvironments.size()-1; i>=0; i-- ) buildEnvironments.get(i).tearDown((AbstractBuild) Build.this,listener); buildEnvironments = null; }

return null;
}

The BuildWrapper.tearDown method is called from within the finally block and
the result is not set yet.