diff --git a/src/ast_builder.rs b/src/ast_builder.rs
new file mode 100644
index 0000000..a5050b0
--- /dev/null
+++ b/src/ast_builder.rs
@@ -0,0 +1,40 @@
+use crate::params::Params;
+use crate::ast::{
+    Quantifier,
+    BaseType,
+    GlobalBlock,
+    Block,
+    Literal,
+    Declaration,
+    Variable,
+    BinaryOperator,
+};
+
+pub struct AstBuilder {
+    params: Params,
+    ast: GlobalBlock,
+}
+
+impl AstBuilder {
+    pub fn from(params: Params) -> Self {
+        Self {
+            params,
+            ast: GlobalBlock::default(),
+        }
+    }
+
+    pub fn generate(&self) {
+    }
+}
+
+impl ToString for AstBuilder {
+    fn to_string(&self) -> String {
+        let mut s = format!("// Generated by {} v{}\n",
+            env!("CARGO_PKG_NAME"),
+            env!("CARGO_PKG_VERSION"),
+        );
+
+        s.push_str(&self.ast.to_string());
+        s
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 506e701..0d73611 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,3 @@
-use std::fs;
 use std::path::PathBuf;
 use clap::Parser;
 
@@ -6,9 +5,11 @@ use clap::Parser;
 extern crate derive_builder;
 
 mod ast;
+mod ast_builder;
 mod params;
 
 use params::Params;
+use ast_builder::AstBuilder;
 
 #[derive(Parser)]
 #[command(author, version, about, long_about = None)]
@@ -18,7 +19,8 @@ struct Args {
 
 fn main() {
     let args = Args::parse();
-    let params_toml = Params::parse(&args.config);
+    let params = Params::parse(&args.config);
+    let builder = AstBuilder::from(params);
 
-    println!("{}", params_toml.global_flow.gen_decl);
+    println!("{}", builder.to_string());
 }