You might have problem on Windows while adding jar to maven because of syntax.
Try encapsulating -D parameters with double quotas like this;
mvn install:install-file "-Dfile=ojdbc6.jar" "-DgroupId=com.oracle" "-DartifactId=ojdbc6" "-Dversion=11.2.0" "-Dpackaging=jar"
Be aware of you should use same version/atifactId/groupId inside your pom.xml. You can't use version 11.2.0.3 after command above. You have to put his in you pom.xml;
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0</version>
</dependency>
If you want to use another version, like 12.1.0.1, you should run above command with that version or other info