Removed visibility modifier code smells

src/test/java/de/rwu/easydrop/util/FormattingUtilTest.java

@@ -10,10 +10,10 @@ import java.lang.reflect.Modifier;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
-public class FormattingUtilTest {
+class FormattingUtilTest {
 
     @Test
-    public void testConstructorIsPrivate()
+    void testConstructorIsPrivate()
             throws NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException {
         // Check for private constructor
         Constructor<FormattingUtil> constructor = FormattingUtil.class.getDeclaredConstructor();
@@ -27,7 +27,7 @@ public class FormattingUtilTest {
     }
 
     @Test
-    public void testFormatEuro_positiveAmount() {
+    void testFormatEuro_positiveAmount() {
         double amount = 1234.56;
         String expectedFormattedAmount = "1.234,56 €";
 
@@ -37,7 +37,7 @@ public class FormattingUtilTest {
     }
 
     @Test
-    public void testFormatEuro_zeroAmount() {
+    void testFormatEuro_zeroAmount() {
         double amount = 0.0;
         String expectedFormattedAmount = "0,00 €";
 
@@ -47,7 +47,7 @@ public class FormattingUtilTest {
     }
 
     @Test
-    public void testFormatEuro_negativeAmount() {
+    void testFormatEuro_negativeAmount() {
         double amount = -789.12;
         String expectedFormattedAmount = "-789,12 €";