Maven is useful if you already manage your builds and dependencies with Maven. So you can conveniently download joafip and all its dependencies, and integrate it in your build. But joafip itself is not currently built with Maven and does not follow the Maven directory layout.
The Maven repository for joafip is here (exactly were the joafip Web site is): http://joafip.sourceforge.net/
joafip core librairy:
<dependency>
<groupId>net.sf.joafip</groupId>
<artifactId>joafip</artifactId>
<version>4.0.0b9</version>
</dependency>
<dependency>
<groupId>net.sf.joafip</groupId>
<artifactId>joafip-log4j</artifactId>
<version>4.0.0b9</version>
</dependency>