Add the single class loader.

src/main/java/space/kklochko/simple_jbdd/tests/loaders/SingleClassLoader.java

@@ -0,0 +1,26 @@
+package space.kklochko.simple_jbdd.tests.loaders;
+
+public class SingleClassLoader {
+    String className;
+
+    public SingleClassLoader(String className) {
+        setClassName(className);
+    }
+
+    public Class<?> load() {
+        try {
+            return Class.forName(getClassName());
+        } catch (ClassNotFoundException e) {
+            return null;
+        }
+    }
+
+    public String getClassName() {
+        return className;
+    }
+
+    public void setClassName(String className) {
+        this.className = className;
+    }
+}
+