[java223] Log too verbose and not clear enough

Closes dalgwen#58

Signed-off-by: Gwendal Roulleau <gwendal.roulleau@gmail.com>

Author: dalgwen

bundles/org.openhab.automation.java223/src/main/java/org/openhab/automation/java223/internal/codegeneration/DependencyGenerator.java

@@ -143,7 +143,11 @@ public synchronized void createCoreDependencies() {
                     packagesSuccessfullyExported.stream().map(s -> s.replace("/", "."))
                             .forEach(packagesNotFound::remove);
                     for (String remainingPackage : packagesNotFound) {
-                        LOGGER.warn("Failed to found classes to export in package {}", remainingPackage);
+                        if (!remainingPackage.isBlank()) {
+                            LOGGER.warn(
+                                    "Failed to find classes to export in one packages listed in the additionalBundles parameter : {}",
+                                    remainingPackage);
+                        }
                     }
                 }
 
@@ -160,7 +164,7 @@ public synchronized void createCoreDependencies() {
 
     private static void copyExportedClassesByClassLoader(Set<String> classesToExtract, JarOutputStream target) {
         for (String classToExtract : classesToExtract) {
-            if (classToExtract.isEmpty()) {
+            if (classToExtract.isBlank()) {
                 continue;
             }
             String path = classToExtract.replaceAll("\\.", "/") + ".class";
@@ -176,7 +180,8 @@ private static void copyExportedClassesByClassLoader(Set<String> classesToExtrac
                     LOGGER.warn("InputStream {} from classpath is null", classToExtract);
                 }
             } catch (IOException e) {
-                LOGGER.warn("Failed to copy classes '{}' from classpath: {}", classToExtract, e.getMessage());
+                LOGGER.warn("Failed to copy from classpath the classes listed in the additionalClasses parameter: '{}'. Error is: {}",
+                        classToExtract, e.getMessage());
             }
         }
     }