public void makeNotNull(ConstructionExample constructionExample){
if(constructionExample.getConstructionType()==null){
constructionExample.setConstructionType(new ConstructionType());
}
if(constructionExample.getDangerCategory()==null){
constructionExample.setDangerCategory(new DangerCategory());
}
if(constructionExample.getRecommendedDangerCategory()==null){
constructionExample.setRecommendedDangerCategory(new DangerCategory());
}
}