ServiceCheckDAOImpl - Queries edited
ServiceCheckDAO - int->Integer
ServiceCheckDAOImpl - Testing parameters (is null)
added to pom.xml: 
<dependency>
    <groupId>org.hibernate</groupId>
    <artifactId>hibernate-entitymanager</artifactId>
    <version>4.2.6.Final</version>
</dependency>
Merge branch 'master' of https://github.com/xstreca1/CarManagementSystem