devlop a software in java

Here are corrections and comments. The problem is that this is fundamentally an illustration of how the GMF works, but not an illustration of your work. You should have described what the requirements were for your thesis, the visual language that you have defined for Feature models (since you are using the GMF, one assumes that you want to create a diagrammatic language for it). Even if you want to use the traditional representation of feature models as trees, you have to show that this is actually created by your definitions and that one can interact with the generated environment to create such trees. Moreover, one would expect that once you have created a model, e.g. the Car model, you can use this model to create an instance of Car.