We present a finite-state-machine-based language, iFSM, to seamlessly integrate the behavioral logic and implementation strategies of object-oriented abstractions and prevent them from being out-of-sync. We provide a transformation engine which automatically translates iFSM specifications to lower-level C++/Java class implementations that are similar in style to manually written code. Further, we automatically verify that these implementations are consistent with their behavior models by translating iFSM specifications into the input language of model checker NuSMV.