fix docblock of database component (#42182)

Connection.php

@@ -167,7 +167,7 @@ class Connection implements ConnectionInterface
     /**
      * All of the callbacks that should be invoked before a query is executed.
      *
-     * @var array
+     * @var \Closure[]
      */
     protected $beforeExecutingCallbacks = [];
 
@@ -181,14 +181,14 @@ class Connection implements ConnectionInterface
     /**
      * Type mappings that should be registered with new Doctrine connections.
      *
-     * @var array
+     * @var array<string, string>
      */
     protected $doctrineTypeMappings = [];
 
     /**
      * The connection resolvers.
      *
-     * @var array
+     * @var \Closure[]
      */
     protected static $resolvers = [];
 

ConnectionResolver.php

@@ -7,7 +7,7 @@ class ConnectionResolver implements ConnectionResolverInterface
     /**
      * All of the registered connections.
      *
-     * @var array
+     * @var \Illuminate\Database\ConnectionInterface[]
      */
     protected $connections = [];
 
@@ -21,7 +21,7 @@ class ConnectionResolver implements ConnectionResolverInterface
     /**
      * Create a new connection resolver instance.
      *
-     * @param  array  $connections
+     * @param  array<string, \Illuminate\Database\ConnectionInterface>  $connections
      * @return void
      */
     public function __construct(array $connections = [])

DatabaseManager.php

@@ -38,14 +38,14 @@ class DatabaseManager implements ConnectionResolverInterface
     /**
      * The active connection instances.
      *
-     * @var array
+     * @var array<string, \Illuminate\Database\Connection>
      */
     protected $connections = [];
 
     /**
      * The custom connection resolvers.
      *
-     * @var array
+     * @var array<string, callable>
      */
     protected $extensions = [];
 
@@ -59,7 +59,7 @@ class DatabaseManager implements ConnectionResolverInterface
     /**
      * The custom Doctrine column types.
      *
-     * @var array
+     * @var array<string, array>
      */
     protected $doctrineTypes = [];
 
@@ -369,7 +369,7 @@ public function setDefaultConnection($name)
     /**
      * Get all of the support drivers.
      *
-     * @return array
+     * @return string[]
      */
     public function supportedDrivers()
     {
@@ -379,7 +379,7 @@ public function supportedDrivers()
     /**
      * Get all of the drivers that are actually available.
      *
-     * @return array
+     * @return string[]
      */
     public function availableDrivers()
     {
@@ -415,7 +415,7 @@ public function forgetExtension($name)
     /**
      * Return all of the created connections.
      *
-     * @return array
+     * @return array<string, \Illuminate\Database\Connection>
      */
     public function getConnections()
     {