Nucleus/Core.md

+The `Core` struct holds
+
+```plantuml
+    class Core << (S,Aquamarine) >> {
+        - clients <font color=blue>map</font>[string]interfaces.Client
+        - database database.Database
+        - config controllerConfig
+
+        + IsRunning <font color=blue>chan</font> bool
+
+        - readControllerConfig(configFileController string) error
+        - readClientConfig(configFileClient string) error
+
+        + Init(socket string, configFileController string, configFileClient string, IsRunningChannel <font color=blue>chan</font> bool) 
+        + AttachDatabase() 
+        + Shutdown() 
+
+    }
+```
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