feat: Added logging and refactored code to accommodate

src/main/java/ch/zhaw/gartenverwaltung/json/GrowthPhaseTypeDeserializer.java

@@ -16,13 +16,12 @@ public class GrowthPhaseTypeDeserializer extends StdDeserializer<GrowthPhaseType
 
     @Override
     public GrowthPhaseType deserialize(JsonParser parser, DeserializationContext context) throws IOException {
-        GrowthPhaseType result = null;
+        GrowthPhaseType result;
         String token = parser.getText();
         try {
             result = GrowthPhaseType.valueOf(token.toUpperCase());
         } catch (IllegalArgumentException e) {
-            // TODO: Log
-            System.err.printf("Bad growth phase type \"%s\"\n", token);
+            throw new IOException(String.format("Bad growth phase type \"%s\"\n", token));
         }
         return result;
     }

src/main/java/ch/zhaw/gartenverwaltung/json/HardinessZoneDeserializer.java

@@ -17,13 +17,12 @@ public class HardinessZoneDeserializer extends StdDeserializer<HardinessZone> {
 
     @Override
     public HardinessZone deserialize(JsonParser parser, DeserializationContext context) throws IOException {
-        HardinessZone result = null;
+        HardinessZone result;
         String token = parser.getText();
         try {
             result = HardinessZone.valueOf(token.toUpperCase());
         } catch (IllegalArgumentException e) {
-            // TODO: Log
-            System.err.printf("Unknown Hardiness Zone \"%s\"\n", token);
+            throw new IOException(String.format("Unknown Hardiness Zone \"%s\"\n", token), e);
         }
         return result;
     }

src/main/java/ch/zhaw/gartenverwaltung/json/PlantImageDeserializer.java

@@ -23,9 +23,7 @@ public class PlantImageDeserializer extends JsonDeserializer<Image> {
             try (InputStream is = new FileInputStream(new File(imageUrl.toURI()))) {
                 result = new Image(is);
             } catch (IllegalArgumentException | URISyntaxException e) {
-                // TODO: Log
-                e.printStackTrace();
-                System.err.printf("Cannot find Image \"%s\"\n", imageUrl.getFile());
+                throw new IOException(String.format("Cannot find Image \"%s\"\n", imageUrl.getFile()));
             }
         }
         return result;