Add pre save/delete handlers

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>com.craftmend</groupId>
     <artifactId>storm</artifactId>
-    <version>1.2.3</version>
+    <version>1.2.4</version>
 
     <properties>
         <maven.compiler.source>1.8</maven.compiler.source>

src/main/java/com/craftmend/storm/Storm.java

@@ -233,6 +233,7 @@ public <T extends StormModel> CompletableFuture<Collection<T>> findAll(Class<T>
      */
     public void delete(StormModel model) throws SQLException {
         catchState();
+        model.preDelete();
         ModelParser parser = registeredModels.get(model.getClass());
         if (parser == null) throw new IllegalArgumentException("The model " + model.getClass().getName() + " isn't loaded. Please call storm.migrate() with an empty instance");
         if (model.getId() == null) throw new IllegalArgumentException("This model doesn't have an ID");
@@ -264,6 +265,7 @@ public <T extends StormModel> ModelParser<T> getParsedModel(Class<T> m, boolean
      */
     public int save(StormModel model) throws SQLException {
         catchState();
+        model.preSave();
         String updateOrInsert = "update %tableName set %psUpdateValues where id=%id";
         String insertStatement = "insert into %tableName(%insertVars) values(%insertValues);";
 

src/main/java/com/craftmend/storm/api/StormModel.java

@@ -36,4 +36,7 @@ public StatementBuilder statements() {
         return statementBuilder;
     }
 
+    public void preSave() {}
+    public void preDelete() {}
+
 }