Remove unnecessary != null check

Plan/src/main/java/com/djrapitops/plan/data/cache/queue/DataCacheSaveQueue.java

@@ -117,8 +117,7 @@ class SaveConsumer extends Consumer<UserData> {
             db.saveUserData(data);
             data.stopAccessing();
             Log.debug(uuid + ": Saved!");
-            if (data.shouldClearAfterSave()
-                    && handler != null) {
+            if (data.shouldClearAfterSave()) {
                 handler.getClearTask().scheduleForClear(uuid);
             }
         } catch (SQLException ex) {

Plan/src/main/java/com/djrapitops/plan/data/handling/LogoutHandling.java

@@ -11,6 +11,13 @@ import main.java.com.djrapitops.plan.data.UserData;
  */
 public class LogoutHandling {
 
+    /**
+     * Constructor used to hide the public constructor
+     */
+    private LogoutHandling() {
+        throw new IllegalStateException("Utility class");
+    }
+
     /**
      * Processes the information of the Event and changes UserData object
      * accordingly.

Plan/src/main/java/com/djrapitops/plan/data/handling/PlaytimeHandling.java

@@ -6,6 +6,13 @@ import main.java.com.djrapitops.plan.data.time.WorldTimes;
 
 public class PlaytimeHandling {
 
+    /**
+     * Constructor used to hide the public constructor
+     */
+    private PlaytimeHandling() {
+        throw new IllegalStateException("Utility class");
+    }
+
     public static void processPlaytimeDependentInfo(UserData data, long time, String gamemode, String worldName) {
         long diff = time - data.getLastPlayed();
         long playTime = data.getPlayTime() + diff;

Plan/src/main/java/com/djrapitops/plan/data/handling/importing/ImportUtils.java

@@ -16,6 +16,13 @@ import static org.bukkit.Bukkit.getPluginManager;
  */
 public class ImportUtils {
 
+    /**
+     * Constructor used to hide the public constructor
+     */
+    private ImportUtils() {
+        throw new IllegalStateException("Utility class");
+    }
+
     /**
      * Checks if a plugin is enabled.
      *