Stubs out filters

src/main/java/com/hubspot/jinjava/lib/filter/CloseHtmlFilter.java

@@ -0,0 +1,32 @@
+package com.hubspot.jinjava.lib.filter;
+
+import com.hubspot.jinjava.doc.annotations.JinjavaDoc;
+import com.hubspot.jinjava.doc.annotations.JinjavaParam;
+import com.hubspot.jinjava.doc.annotations.JinjavaSnippet;
+import com.hubspot.jinjava.interpret.JinjavaInterpreter;
+
+@JinjavaDoc(
+  value = "Closes open HTML tags in a string",
+  input = @JinjavaParam(value = "s", desc = "String to close", required = true),
+  snippets = {
+    @JinjavaSnippet(
+      code = "{{ \"<p> Hello, world\"|closehtml }}"
+    )
+  }
+)
+public class CloseHtmlFilter implements Filter{
+
+  @Override
+  public String getName() {
+    return "render";
+  }
+
+  @Override
+  public Object filter(Object var, JinjavaInterpreter interpreter, String... args) {
+    /*
+    Closes open HTML tags.
+     */
+
+    return null;
+  }
+}

src/main/java/com/hubspot/jinjava/lib/filter/RenderFilter.java

@@ -24,6 +24,12 @@ public String getName() {
 
   @Override
   public Object filter(Object var, JinjavaInterpreter interpreter, String... args) {
+    if (args.length > 0) {
+      /*
+       This means a render limit length has been provided.
+       Here we begin a left to right render where we add to an HTML string until the length reaches a certain limit.
+       */
+    }
     return interpreter.render(Objects.toString(var));
   }
 }