diff --git a/src/main/java/de/gnmyt/SQLToolkit/drivers/MySQLConnection.java b/src/main/java/de/gnmyt/SQLToolkit/drivers/MySQLConnection.java
index 3e57511..4c09732 100755
--- a/src/main/java/de/gnmyt/SQLToolkit/drivers/MySQLConnection.java
+++ b/src/main/java/de/gnmyt/SQLToolkit/drivers/MySQLConnection.java
@@ -141,6 +141,7 @@ public class MySQLConnection {
 
     /**
      * Gets the table generator
+     *
      * @param tableName The name of the table
      * @return the instance of the table generator
      */
@@ -198,6 +199,7 @@ public class MySQLConnection {
 
     /**
      * Gets the deletion manager for easier deleting rows in a table
+     *
      * @return the deletion manager
      */
     public DeletionManager delete() {
@@ -206,6 +208,7 @@ public class MySQLConnection {
 
     /**
      * Gets the deletion manager for easier deleting rows in a table
+     *
      * @param tableName The name of the table you want to delete a row from
      * @return the deletion manager
      */
diff --git a/src/main/java/de/gnmyt/SQLToolkit/manager/DeletionManager.java b/src/main/java/de/gnmyt/SQLToolkit/manager/DeletionManager.java
index 895b73c..5476d21 100644
--- a/src/main/java/de/gnmyt/SQLToolkit/manager/DeletionManager.java
+++ b/src/main/java/de/gnmyt/SQLToolkit/manager/DeletionManager.java
@@ -14,7 +14,7 @@ public class DeletionManager {
     private final MySQLConnection connection;
     private final HashMap<String, Object> whereList;
     private final ArrayList<Object> databaseParameters;
-    private ArrayList<String> optionalQuery;
+    private final ArrayList<String> optionalQuery;
     private String tableName;
 
     /**
diff --git a/src/main/java/de/gnmyt/SQLToolkit/manager/SelectionManager.java b/src/main/java/de/gnmyt/SQLToolkit/manager/SelectionManager.java
index f1a42b9..4c9a31b 100644
--- a/src/main/java/de/gnmyt/SQLToolkit/manager/SelectionManager.java
+++ b/src/main/java/de/gnmyt/SQLToolkit/manager/SelectionManager.java
@@ -15,7 +15,7 @@ public class SelectionManager {
     private final MySQLConnection connection;
     private final HashMap<String, Object> whereList;
     private final ArrayList<Object> databaseParameters;
-    private ArrayList<String> optionalQuery;
+    private final ArrayList<String> optionalQuery;
     private int limit;
     private String tableName;
 
diff --git a/src/main/java/de/gnmyt/SQLToolkit/storage/SQLTable.java b/src/main/java/de/gnmyt/SQLToolkit/storage/SQLTable.java
index e6b1628..29bf071 100644
--- a/src/main/java/de/gnmyt/SQLToolkit/storage/SQLTable.java
+++ b/src/main/java/de/gnmyt/SQLToolkit/storage/SQLTable.java
@@ -146,6 +146,7 @@ public abstract class SQLTable {
 
     /**
      * Gets the deletion manager of the current table
+     *
      * @return the deletion manager
      */
     public DeletionManager delete() {