There is not a Creo View adapter that is capable of publishing DWG (or DXF) files. Fortunately, one isn't needed since Creo View can open these files directly. The trick is to tell Windchill that the data has already been published and to just create the thumbnail. Full instructions can be found here:
Automatically generate representation for pre-converted files (CS36856)
Here are the commands I ran on my system to do this very thing: (10.2 M020)
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..DWG=DUMMY,preconverted=true
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..DXF=DUMMY,preconverted=true
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..PDF=DUMMY,preconverted=true
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..BMP=DUMMY,preconverted=true
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..JPG=DUMMY,preconverted=true
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..TIF=DUMMY,preconverted=true
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..GIF=DUMMY,preconverted=true
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..PVZ=DUMMY,type=zip,preconverted=true
xconfmanager -t codebase/WEB-INF/conf/wvs.properties -s worker..EDZ=DUMMY,type=zip,preconverted=true
xconfmanager -p
After making the changes you will need to stop Windchill, clear the Tomcat caches, and restart.