Fix Javadoc warnings due to Java 21 update (+ some other warnings)

The default implicit constructor must also have a doc comment, so I have to make it explicit and either properly restrict the visibility of the constructor, or actually document it.

pandalib-util/src/main/java/fr/pandacube/lib/util/DistanceUtil.java

@@ -104,4 +104,7 @@ public class DistanceUtil {
 		}
 	}
 
+
+	private DistanceUtil() {}
+
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/EnumUtil.java

@@ -84,4 +84,6 @@ public class EnumUtil {
 		return RandomUtil.arrayElement(enumType.getEnumConstants());
 	}
 
+	private EnumUtil() {}
+
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/FileUtils.java

@@ -52,4 +52,7 @@ public class FileUtils {
 			Files.copy(source.toPath(), target.toPath());
 		}
 	}
+
+
+	private FileUtils() {}
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/ListUtil.java

@@ -21,4 +21,8 @@ public class ListUtil {
 			list.add(i);
 		}
 	}
+
+
+	private ListUtil() {}
+
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/MemoryUtil.java

@@ -158,5 +158,7 @@ public class MemoryUtil {
 			unitMultiplier = uMultiplier;
 		}
 	}
+
+	private MemoryUtil() {}
 	
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/MinecraftWebUtil.java

@@ -97,6 +97,8 @@ public class MinecraftWebUtil {
 		return builder.toString();
 		
 	}
+
+	private MinecraftWebUtil() {}
 	
 	
 

pandalib-util/src/main/java/fr/pandacube/lib/util/OfflineUUID.java

@@ -10,7 +10,7 @@ import java.util.UUID;
  * <p>
  * You can generate the UUID programmatically using {@link #getFromNickName(String)} and
  * {@link #getFromNickNames(String[])}.
- *
+ * <p>
  * To use this class as a program, type
  * <pre>
  *     java -cp&lt;anyClassPathContainingThisClass&gt; fr.pandacube.lib.util.OfflineUUID [playernames...]
@@ -67,4 +67,6 @@ public class OfflineUUID {
 				System.out.println(arg + "\t" + getFromNickName(arg));
 		}
 	}
+
+	private OfflineUUID() {}
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/RandomUtil.java

@@ -172,7 +172,7 @@ public class RandomUtil {
 		return String.valueOf(pw);
 	}
 	
-	
+	private RandomUtil() {}
 	
 
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/StringUtil.java

@@ -146,6 +146,6 @@ public class StringUtil {
 
 
 
-
+	private StringUtil() {}
 
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/ThrowableUtil.java

@@ -147,5 +147,6 @@ public class ThrowableUtil {
 		return new RuntimeException(t);
 	}
 
+	private ThrowableUtil() {}
 
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/Tick.java

@@ -56,4 +56,6 @@ public class Tick {
 		return Duration.ofMillis(toMs(tick));
 	}
 
+	private Tick() {}
+
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/TimeUtil.java

@@ -481,4 +481,7 @@ public class TimeUtil {
 	}
 
 
+	private TimeUtil() {}
+
+
 }

pandalib-util/src/main/java/fr/pandacube/lib/util/function/BiConsumerException.java

@@ -2,6 +2,9 @@ package fr.pandacube.lib.util.function;
 
 /**
  * A consumer that can possibly throw a checked exception.
+ * @param <T> the first parameter for this bi-consumer.
+ * @param <U> the second parameter for this bi-consumer.
+ * @param <E> the exception type that this interface method can throw.
  */
 @FunctionalInterface
 public interface BiConsumerException<T, U, E extends Exception> {

pandalib-util/src/main/java/fr/pandacube/lib/util/function/PredicateException.java

@@ -2,6 +2,8 @@ package fr.pandacube.lib.util.function;
 
 /**
  * A predicate that can possibly throw a checked exception.
+ * @param <T> the parameter for this predicate.
+ * @param <E> the exception type that this predicate can throw.
  */
 @FunctionalInterface
 public interface PredicateException<T, E extends Exception> {

pandalib-util/src/main/java/fr/pandacube/lib/util/function/RunnableException.java

@@ -2,6 +2,7 @@ package fr.pandacube.lib.util.function;
 
 /**
  * A runnable that can possibly throw a checked exception.
+ * @param <E> the exception type that this interface method can throw.
  */
 @FunctionalInterface
 public interface RunnableException<E extends Exception> {

pandalib-util/src/main/java/fr/pandacube/lib/util/function/SupplierException.java

@@ -2,6 +2,8 @@ package fr.pandacube.lib.util.function;
 
 /**
  * A supplier that can possibly throw a checked exception.
+ * @param <T> the return type of this supplier.
+ * @param <E> the exception type that this interface method can throw.
  */
 @FunctionalInterface
 public interface SupplierException<T, E extends Exception> {

pandalib-util/src/main/java/fr/pandacube/lib/util/function/ToIntBiFunctionException.java

@@ -2,6 +2,9 @@ package fr.pandacube.lib.util.function;
 
 /**
  * A function that can possibly throw a checked exception.
+ * @param <T> the first parameter for this bi-function.
+ * @param <U> the second parameter for this bi-function.
+ * @param <E> the exception type that this interface method can throw.
  */
 @FunctionalInterface
 public interface ToIntBiFunctionException<T, U, E extends Exception> {

pandalib-util/src/main/java/fr/pandacube/lib/util/function/TriConsumerException.java

@@ -2,6 +2,10 @@ package fr.pandacube.lib.util.function;
 
 /**
  * A consumer that can possibly throw a checked exception.
+ * @param <T> the first parameter for this tri-consumer.
+ * @param <U> the second parameter for this tri-consumer.
+ * @param <V> the third parameter for this tri-consumer.
+ * @param <E> the exception type that this interface method can throw.
  */
 @FunctionalInterface
 public interface TriConsumerException<T, U, V, E extends Exception> {

pandalib-util/src/main/java/fr/pandacube/lib/util/log/DailyLogRotateFileHandler.java

@@ -30,6 +30,11 @@ public class DailyLogRotateFileHandler extends Handler {
 	private String currentFileDate = getCurrentDay();
 	private boolean closed = false;
 
+	/**
+	 * Creates a new {@link DailyLogRotateFileHandler}.
+	 */
+	public DailyLogRotateFileHandler() {}
+
 
 	@Override
 	public synchronized void close() throws SecurityException {

pandalib-util/src/main/java/fr/pandacube/lib/util/log/Log.java

@@ -159,4 +159,6 @@ public final class Log {
 		logger.info(message);
 	}
 
+	private Log() {}
+
 }