Refactor xxx : public xxxx

**[Original report](https://bitbucket.org/imasi/imasiengine/issue/75) by Iván Sanz (Bitbucket: [ivansanz](https://bitbucket.org/ivansanz), GitHub: [isc30](https://github.com/isc30)).**

----------------------------------------

Change
```
class xxxx : public yyyy
{
```
To
```
class xxxx
    : public yyyy
{
```
