Utilise un point comme séparateur de namespace.

Command/EntitySchemaCommand.php

@@ -52,7 +52,7 @@ class EntitySchemaCommand extends ContainerAwareCommand
 
         $stream = fopen("php://output", "wt");
         fputs($stream, "@startuml\n");
-        fputs($stream, 'set namespaceSeparator \\\\'."\n");
+        fputs($stream, "set namespaceSeparator .\n");
         $visitor->outputTo($stream);
         fputs($stream, "@enduml\n");
         fclose($stream);

Model/Node/BaseNode.php

@@ -65,7 +65,7 @@ class BaseNode implements UmlNodeInterface
 
     public function outputAliasTo($stream)
     {
-        fputs($stream, '"'.str_replace('\\', '\\\\', $this->name).'"');
+        fputs($stream, '"'.str_replace('\\', '.', $this->name).'"');
     }
 
     protected function outputClassifiersTo($stream)