Improve code

Author: purejava

src/test/java/org/purejava/KeepassProxyAccessTest.java

@@ -10,7 +10,7 @@
  * This test is designed to run within CI, where a KeePassXC database is not available.
  */
 public class KeepassProxyAccessTest {
-    private KeepassProxyAccess kpa = new KeepassProxyAccess();
+    private final KeepassProxyAccess kpa = new KeepassProxyAccess();
 
     @Test
     @Order(1)

src/test/java/org/purejava/LockedDatabaseTest.java

@@ -11,7 +11,7 @@
  * For this test, KeePassXC should be started, but locked.
  */
 public class LockedDatabaseTest {
-    private KeepassProxyAccess kpa = new KeepassProxyAccess();
+    private final KeepassProxyAccess kpa = new KeepassProxyAccess();
 
     @Test
     @Order(2)