http://sourceforge.net/projects/schemaspy/
place hana.properties inside schemaspy path /src/main/resources/net/sourceforge/schemaspy/dbTypes/ and rebuild the jar
schemaspy supports the -t parameter, where you can either list the database type to use (pulling from the schemaspy jar) or specify the hana.properties file directly.
Please make sure you use the right port number, it is computed from the HANA databases instance number.
The formula is: 30015 + ( InstanceNumber * 100 ).
Example: Instance 42: 30015 + ( 42 * 100 ) = 34215