Fix OBL_UNSATISFIED_OBLIGATION in Scanner class

src/main/java/de/rub/nds/scanner/core/execution/Scanner.java

@@ -259,4 +259,10 @@ protected void registerProbeForExecution(ProbeT probe, boolean executeByDefault)
     protected void registerProbeForExecution(AfterProbeT afterProbe) {
         afterList.add(afterProbe);
     }
+
+    @Override
+    public void close() throws Exception {
+        // No resources to close in base Scanner class
+        // Subclasses can override this method if they have resources to clean up
+    }
 }

src/test/java/de/rub/nds/scanner/core/execution/ScannerTest.java

@@ -399,7 +399,7 @@ public void testAutoCloseable() throws Exception {
         assertInstanceOf(AutoCloseable.class, scanner);
 
         // Test close method
-        scanner.close();
+        assertDoesNotThrow(scanner::close);
     }
 
     @Test