Using undojoin with eclim's JavaImportOrganize

This is my existing script for java imports. It gets around eclim not supporting inferring static imports by inserting them into the file before calling JavaImportOrganize. The problem is this creates two entries in my undo history. One for the static imports and one for the call to JavaImportOrganize. I'm trying to use undojoin but it doesn't seem to be working. The call to undo doesn't seem to be working either.

Can anyone suggest improvements? Thanks!

function! HandleImports()
if (&ft == 'java' && eclim#EclimAvailable() && eclim#project#util#IsCurrentFileInProject())
mark `
call cursor(2, 0)
normal Aimport static org.junit.Assert.*;
normal Aimport static org.mockito.Matchers.*;
normal Aimport static org.mockito.Mockito.*;
normal O
normal ``
try
" TODO: why doesn't undojoin work?
undojoin | execute "JavaImportOrganize"
catch
" TODO: This doesn't work either.
undo
endtry
endif
endfunction

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