Extract getModelDir method

test-plugins/org.yakindu.sct.model.stext.test/src/org/yakindu/sct/model/stext/test/validation/AbstractSTextValidationTest.java

@@ -101,10 +101,14 @@ public abstract class AbstractSTextValidationTest extends AbstractSTextTest {
 
 	protected Statechart loadStatechart(String modelName) {
 		return AbstractTestModelsUtil
-				.loadStatechart(VALIDATION_TESTMODEL_DIR
+				.loadStatechart(getModelDir()
 						+ modelName);
 	}
 
+	protected String getModelDir() {
+		return VALIDATION_TESTMODEL_DIR;
+	}
+
 	protected void doValidateAllContents(Class<? extends EObject> clazz) {
 		Iterator<EObject> iter = statechart.eAllContents();
 		while (iter.hasNext()) {