added error model (just inherits from dao)
added error model (just inherits from dao)

Impactstory/total-impact-core,Impactstory/total-impact-core,total-impact/total-impact-core,Impactstory/total-impact-core,total-impact/total-impact-core,total-impact/total-impact-core,Impactstory/total-impact-core,total-impact/total-impact-core