SchemaSpy - Connection Failure - postgresql

Question

I want to visualise my data base and tried using SchemaSpy, but I can't connect to the data base. It's a mysql data base, running on my computer, accessible under localhost and I called SchemaSpy with the following command:
java -jar schemaspy-6.0.0.jar -t mysql -dp postgresql-42.2.7.jar -db <name> -host <host> -p <port> -s <name> -u <user> -p <password> -o ./output/
I downloaded postgresql-42.2.7.jar as a driver and set the respective parameter in the call. I also tried not setting a driver at all, but it didn't change the output.
I get the following error message after trying to run SchemaSpy:
SchemaSpy generates an HTML representation of a database schema's relationships.
SchemaSpy comes with ABSOLUTELY NO WARRANTY.
SchemaSpy is free software and can be redistributed under the conditions of LGPL version 3 or later.
http://www.gnu.org/licenses/
INFO - Starting Main v6.0.0 on ####### with PID 10774 (/path/to/file started by ##### in /path/to/file)
INFO - The following profiles are active: default
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (jar:file:/path/to/file/schemaspy-6.0.0.jar!/BOOT-INF/lib/spring-core-4.3.13.RELEASE.jar!/) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
INFO - Found configuration file: schemaspy.properties
INFO - Started Main in 1.397 seconds (JVM running for 1.944)
INFO - Starting schema analysis
WARN - Connection Failure
I also tried setting the --illegal-access=warn parameter, but no changes.
Does anyone know what problem might be?
Thanks a lot!