First try with an h2 database connection

Some issues with the filename, it took me 3 hours...

http://stackoverflow.com/questions/8818466/h2-error-on-all-other-computers

http://stackoverflow.com/questions/2442867/h2-embedded-mode-database-files-problem
Revert "Complete version using generics and abstract classes"

This reverts commit c09841112bc9708248760b38f91c03d8c195b5b7.

Conflicts:
	.idea/workspace.xml
	target/app-supermercado-1.1.8.RELEASE.jar.original

	target/maven-status/maven-compiler-plugin/compile/default-compile/createdFiles.lst

	target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst