Initialize the following the works:
a ) Create the file 'exception.py' to deal with the special exception
meet during translating the TOSCA to Juju
b ) Create the file 'juju_relationhooks.py' to translate the TOSCA
relationimplementation to Juju relationhooks
c ) Create the file 'juju_nuithooks.py' to translate the TOSCA
nodeimplementation to Juju unithooks