diff --git a/Cargo.lock b/Cargo.lock
index 0087624..3bea8b4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,6 +2,26 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "ansi_term"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi 0.1.19",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -20,6 +40,21 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "clap"
+version = "2.34.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
+dependencies = [
+ "ansi_term",
+ "atty",
+ "bitflags",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
+]
+
 [[package]]
 name = "errno"
 version = "0.3.0"
@@ -50,6 +85,24 @@ dependencies = [
  "instant",
 ]
 
+[[package]]
+name = "heck"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c"
+dependencies = [
+ "unicode-segmentation",
+]
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62b467343b94ba476dcb2500d242dadbb39557df889310ac77c5d99100aaac33"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.3.1"
@@ -71,7 +124,7 @@ version = "1.0.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09270fd4fa1111bc614ed2246c7ef56239a3063d5be0d1ec3b589c505d400aeb"
 dependencies = [
- "hermit-abi",
+ "hermit-abi 0.3.1",
  "libc",
  "windows-sys",
 ]
@@ -82,6 +135,12 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "453ad9f582a441959e5f0d088b02ce04cfe8d51a8eaf077f12ac6d3e94164ca6"
 
+[[package]]
+name = "lazy_static"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
+
 [[package]]
 name = "libc"
 version = "0.2.140"
@@ -101,6 +160,7 @@ dependencies = [
  "once_cell",
  "serde",
  "serde_json",
+ "structopt",
  "tempfile",
  "uuid",
 ]
@@ -111,6 +171,30 @@ version = "1.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
 
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "version_check",
+]
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.54"
@@ -175,7 +259,7 @@ checksum = "4c614d17805b093df4b147b51339e7e44bf05ef59fba1e45d83500bcfb4d8585"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn",
+ "syn 2.0.11",
 ]
 
 [[package]]
@@ -189,6 +273,47 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
+
+[[package]]
+name = "structopt"
+version = "0.3.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c6b5c64445ba8094a6ab0c3cd2ad323e07171012d9c98b0b15651daf1787a10"
+dependencies = [
+ "clap",
+ "lazy_static",
+ "structopt-derive",
+]
+
+[[package]]
+name = "structopt-derive"
+version = "0.4.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dcb5ae327f9cc13b68763b5749770cb9e048a99bd9dfdfa58d0cf05d5f64afe0"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "syn"
+version = "1.0.109"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
 [[package]]
 name = "syn"
 version = "2.0.11"
@@ -213,12 +338,33 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "textwrap"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e5464a87b239f13a63a501f2701565754bae92d243d4bb7eb12f6d57d2269bf4"
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.10.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1dd624098567895118886609431a7c3b8f516e41d30e0643f03d94592a147e36"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"
+
 [[package]]
 name = "uuid"
 version = "1.3.0"
@@ -228,6 +374,40 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
 [[package]]
 name = "windows-sys"
 version = "0.45.0"
diff --git a/Cargo.toml b/Cargo.toml
index 997b3b1..bbacf07 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
+structopt = "0.3"
 uuid = { version = "1.3", features = ["serde"] }
 
 [dev-dependencies]
diff --git a/src/library/beets.rs b/src/library/beets.rs
index 3db39d5..59b5e76 100644
--- a/src/library/beets.rs
+++ b/src/library/beets.rs
@@ -4,7 +4,9 @@
 use std::{
     collections::{HashMap, HashSet},
     fmt::Display,
-    process::Command, path::{PathBuf, Path},
+    path::{Path, PathBuf},
+    process::Command,
+    str,
 };
 
 use crate::{Album, AlbumId, Artist, ArtistId, Track};
@@ -228,17 +230,22 @@ pub struct SystemExecutor {
 }
 
 impl SystemExecutor {
-    pub fn new(bin: &str, path: Option<&Path>) -> SystemExecutor {
+    pub fn new(bin: &str) -> Self {
         SystemExecutor {
             bin: bin.to_string(),
-            config: path.map(|p| p.to_path_buf()),
+            config: None,
         }
     }
+
+    pub fn config(mut self, path: Option<&Path>) -> Self {
+        self.config = path.map(|p| p.to_path_buf());
+        self
+    }
 }
 
 impl Default for SystemExecutor {
     fn default() -> Self {
-        SystemExecutor::new("beet", None)
+        SystemExecutor::new("beet")
     }
 }
 
@@ -250,7 +257,12 @@ impl BeetsExecutor for SystemExecutor {
             cmd.arg(path);
         }
         let output = cmd.args(arguments).output()?;
-        let output = std::str::from_utf8(&output.stdout)?;
+        if !output.status.success() {
+            return Err(Error::CmdExecError(
+                String::from_utf8_lossy(&output.stderr).to_string(),
+            ));
+        }
+        let output = str::from_utf8(&output.stdout)?;
         Ok(output.split('\n').map(|s| s.to_string()).collect())
     }
 }
diff --git a/src/library/mod.rs b/src/library/mod.rs
index ed8eb25..eed424a 100644
--- a/src/library/mod.rs
+++ b/src/library/mod.rs
@@ -1,6 +1,6 @@
 //! Module for interacting with the music library.
 
-use std::{num::ParseIntError, str::Utf8Error};
+use std::{num::ParseIntError, str::Utf8Error, fmt};
 
 use crate::Artist;
 
@@ -98,6 +98,8 @@ impl Query {
 /// Error type for library calls.
 #[derive(Debug)]
 pub enum Error {
+    /// The underlying library failed to execute a command.
+    CmdExecError(String),
     /// The underlying library returned invalid data.
     InvalidData(String),
     /// The underlying library experienced an I/O error.
@@ -126,6 +128,12 @@ impl From<Utf8Error> for Error {
     }
 }
 
+impl fmt::Display for Error {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "{:#?}", self)
+    }
+}
+
 /// Trait for interacting with the music library.
 pub trait Library {
     /// List lirbary items that match the a specific query.
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..4847c96
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,57 @@
+use std::{path::PathBuf, process::exit};
+
+use structopt::StructOpt;
+
+use musichoard::{
+    database::{
+        json::{DatabaseJson, DatabaseJsonFile},
+        DatabaseWrite,
+    },
+    library::{
+        beets::{Beets, SystemExecutor},
+        Library, Query,
+    },
+};
+
+#[derive(StructOpt)]
+struct Opt {
+    #[structopt(
+        short = "b",
+        long = "beets-config",
+        name = "beets config file path",
+        parse(from_os_str)
+    )]
+    beets_config_file_path: Option<PathBuf>,
+
+    #[structopt(
+        short = "d",
+        long = "database",
+        name = "database file path",
+        default_value = "database.json",
+        parse(from_os_str)
+    )]
+    database_file_path: PathBuf,
+}
+
+fn main() {
+    let opt = Opt::from_args();
+
+    let mut beets = Beets::new(Box::new(
+        SystemExecutor::default().config(opt.beets_config_file_path.as_deref()),
+    ));
+
+    let collection = match beets.list(&Query::new()) {
+        Ok(collection) => collection,
+        Err(e) => {
+            println!("{e}");
+            exit(1)
+        }
+    };
+
+    let mut database = DatabaseJson::new(Box::new(DatabaseJsonFile::new(&opt.database_file_path)));
+
+    if let Err(e) = database.write(&collection) {
+        println!("{e}");
+        exit(1)
+    }
+}
diff --git a/tests/library/beets.rs b/tests/library/beets.rs
index d9aca3e..f176fe7 100644
--- a/tests/library/beets.rs
+++ b/tests/library/beets.rs
@@ -12,7 +12,7 @@ use crate::COLLECTION;
 
 #[test]
 fn test_no_config_list() {
-    let executor = SystemExecutor::new("beet", None);
+    let executor = SystemExecutor::default();
 
     let mut beets = Beets::new(Box::new(executor));
     let output = beets.list(&Query::default()).unwrap();
@@ -23,10 +23,9 @@ fn test_no_config_list() {
 
 #[test]
 fn test_full_list() {
-    let executor = SystemExecutor::new(
-        "beet",
-        Some(&fs::canonicalize("./tests/files/library/config.yml").unwrap()),
-    );
+    let executor = SystemExecutor::default().config(Some(
+        &fs::canonicalize("./tests/files/library/config.yml").unwrap(),
+    ));
 
     let mut beets = Beets::new(Box::new(executor));
     let output = beets.list(&Query::default()).unwrap();
@@ -37,10 +36,9 @@ fn test_full_list() {
 
 #[test]
 fn test_album_artist_query() {
-    let executor = SystemExecutor::new(
-        "beet",
-        Some(&fs::canonicalize("./tests/files/library/config.yml").unwrap()),
-    );
+    let executor = SystemExecutor::default().config(Some(
+        &fs::canonicalize("./tests/files/library/config.yml").unwrap(),
+    ));
 
     let mut beets = Beets::new(Box::new(executor));
     let output = beets
@@ -53,27 +51,24 @@ fn test_album_artist_query() {
 
 #[test]
 fn test_album_title_query() {
-    let executor = SystemExecutor::new(
-        "beet",
-        Some(&fs::canonicalize("./tests/files/library/config.yml").unwrap()),
-    );
+    let executor = SystemExecutor::default().config(Some(
+        &fs::canonicalize("./tests/files/library/config.yml").unwrap(),
+    ));
 
     let mut beets = Beets::new(Box::new(executor));
     let output = beets
         .list(&Query::default().album_title(QueryOption::Include(String::from("Slovo"))))
         .unwrap();
 
-
     let expected: Vec<Artist> = COLLECTION[0..1].to_owned();
     assert_eq!(output, expected);
 }
 
 #[test]
 fn test_exclude_query() {
-    let executor = SystemExecutor::new(
-        "beet",
-        Some(&fs::canonicalize("./tests/files/library/config.yml").unwrap()),
-    );
+    let executor = SystemExecutor::default().config(Some(
+        &fs::canonicalize("./tests/files/library/config.yml").unwrap(),
+    ));
 
     let mut beets = Beets::new(Box::new(executor));
     let output = beets